diff --git a/src/inspector/node_inspector.gypi b/src/inspector/node_inspector.gypi
index ba24e6acfc0744..a2dfdcb42db196 100644
--- a/src/inspector/node_inspector.gypi
+++ b/src/inspector/node_inspector.gypi
@@ -39,7 +39,6 @@
     ],
     'node_protocol_files': [
       '<(protocol_tool_path)/lib/Allocator_h.template',
-      '<(protocol_tool_path)/lib/Array_h.template',
       '<(protocol_tool_path)/lib/base_string_adapter_cc.template',
       '<(protocol_tool_path)/lib/base_string_adapter_h.template',
       '<(protocol_tool_path)/lib/DispatcherBase_cpp.template',
diff --git a/src/inspector/tracing_agent.cc b/src/inspector/tracing_agent.cc
index cdbdd63f8aff9f..e7b6d3b3ea63bd 100644
--- a/src/inspector/tracing_agent.cc
+++ b/src/inspector/tracing_agent.cc
@@ -147,8 +147,8 @@ DispatchResponse TracingAgent::start(
   std::set<std::string> categories_set;
   protocol::Array<std::string>* categories =
       traceConfig->getIncludedCategories();
-  for (size_t i = 0; i < categories->length(); i++)
-    categories_set.insert(categories->get(i));
+  for (size_t i = 0; i < categories->size(); i++)
+    categories_set.insert((*categories)[i]);
 
   if (categories_set.empty())
     return DispatchResponse::Error("At least one category should be enabled");
@@ -172,29 +172,29 @@ DispatchResponse TracingAgent::stop() {
 
 DispatchResponse TracingAgent::getCategories(
     std::unique_ptr<protocol::Array<String>>* categories) {
-  *categories = Array<String>::create();
+  *categories = std::make_unique<Array<String>>();
   protocol::Array<String>* categories_list = categories->get();
   // In alphabetical order
-  categories_list->addItem("node");
-  categories_list->addItem("node.async_hooks");
-  categories_list->addItem("node.bootstrap");
-  categories_list->addItem("node.console");
-  categories_list->addItem("node.dns.native");
-  categories_list->addItem("node.environment");
-  categories_list->addItem("node.fs.async");
-  categories_list->addItem("node.fs.sync");
-  categories_list->addItem("node.fs_dir.async");
-  categories_list->addItem("node.fs_dir.sync");
-  categories_list->addItem("node.http");
-  categories_list->addItem("node.net.native");
-  categories_list->addItem("node.perf");
-  categories_list->addItem("node.perf.timerify");
-  categories_list->addItem("node.perf.usertiming");
-  categories_list->addItem("node.promises.rejections");
-  categories_list->addItem("node.threadpoolwork.async");
-  categories_list->addItem("node.threadpoolwork.sync");
-  categories_list->addItem("node.vm.script");
-  categories_list->addItem("v8");
+  categories_list->emplace_back("node");
+  categories_list->emplace_back("node.async_hooks");
+  categories_list->emplace_back("node.bootstrap");
+  categories_list->emplace_back("node.console");
+  categories_list->emplace_back("node.dns.native");
+  categories_list->emplace_back("node.environment");
+  categories_list->emplace_back("node.fs.async");
+  categories_list->emplace_back("node.fs.sync");
+  categories_list->emplace_back("node.fs_dir.async");
+  categories_list->emplace_back("node.fs_dir.sync");
+  categories_list->emplace_back("node.http");
+  categories_list->emplace_back("node.net.native");
+  categories_list->emplace_back("node.perf");
+  categories_list->emplace_back("node.perf.timerify");
+  categories_list->emplace_back("node.perf.usertiming");
+  categories_list->emplace_back("node.promises.rejections");
+  categories_list->emplace_back("node.threadpoolwork.async");
+  categories_list->emplace_back("node.threadpoolwork.sync");
+  categories_list->emplace_back("node.vm.script");
+  categories_list->emplace_back("v8");
   return DispatchResponse::OK();
 }
 
diff --git a/tools/inspector_protocol/code_generator.py b/tools/inspector_protocol/code_generator.py
index 0b8baea0ae710e..a6e163c6fe911f 100755
--- a/tools/inspector_protocol/code_generator.py
+++ b/tools/inspector_protocol/code_generator.py
@@ -638,7 +638,6 @@ def main():
             "Object_h.template",
             "ValueConversions_h.template",
             "Maybe_h.template",
-            "Array_h.template",
             "DispatcherBase_h.template",
             "Parser_h.template",
             "encoding_h.template",
diff --git a/tools/inspector_protocol/inspector_protocol.gni b/tools/inspector_protocol/inspector_protocol.gni
index d612fb6aebb52c..3e934526b82ae1 100644
--- a/tools/inspector_protocol/inspector_protocol.gni
+++ b/tools/inspector_protocol/inspector_protocol.gni
@@ -36,7 +36,6 @@ template("inspector_protocol_generate") {
       "$inspector_protocol_dir/lib/encoding_h.template",
       "$inspector_protocol_dir/lib/encoding_cpp.template",
       "$inspector_protocol_dir/lib/Allocator_h.template",
-      "$inspector_protocol_dir/lib/Array_h.template",
       "$inspector_protocol_dir/lib/DispatcherBase_cpp.template",
       "$inspector_protocol_dir/lib/DispatcherBase_h.template",
       "$inspector_protocol_dir/lib/ErrorSupport_cpp.template",
diff --git a/tools/inspector_protocol/inspector_protocol.gypi b/tools/inspector_protocol/inspector_protocol.gypi
index d614474e69c32e..c11386dc05174e 100644
--- a/tools/inspector_protocol/inspector_protocol.gypi
+++ b/tools/inspector_protocol/inspector_protocol.gypi
@@ -8,7 +8,6 @@
       'lib/encoding_h.template',
       'lib/encoding_cpp.template',
       'lib/Allocator_h.template',
-      'lib/Array_h.template',
       'lib/DispatcherBase_cpp.template',
       'lib/DispatcherBase_h.template',
       'lib/ErrorSupport_cpp.template',
diff --git a/tools/inspector_protocol/lib/Array_h.template b/tools/inspector_protocol/lib/Array_h.template
deleted file mode 100644
index c420a0f7e9650a..00000000000000
--- a/tools/inspector_protocol/lib/Array_h.template
+++ /dev/null
@@ -1,138 +0,0 @@
-// This file is generated by Array_h.template.
-
-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef {{"_".join(config.protocol.namespace)}}_Array_h
-#define {{"_".join(config.protocol.namespace)}}_Array_h
-
-//#include "ErrorSupport.h"
-//#include "Forward.h"
-//#include "ValueConversions.h"
-//#include "Values.h"
-
-{% for namespace in config.protocol.namespace %}
-namespace {{namespace}} {
-{% endfor %}
-
-template<typename T>
-class Array {
-public:
-    static std::unique_ptr<Array<T>> create()
-    {
-        return std::unique_ptr<Array<T>>(new Array<T>());
-    }
-
-    static std::unique_ptr<Array<T>> fromValue(protocol::Value* value, ErrorSupport* errors)
-    {
-        protocol::ListValue* array = ListValue::cast(value);
-        if (!array) {
-            errors->addError("array expected");
-            return nullptr;
-        }
-        std::unique_ptr<Array<T>> result(new Array<T>());
-        errors->push();
-        for (size_t i = 0; i < array->size(); ++i) {
-            errors->setName(StringUtil::fromInteger(i));
-            std::unique_ptr<T> item = ValueConversions<T>::fromValue(array->at(i), errors);
-            result->m_vector.push_back(std::move(item));
-        }
-        errors->pop();
-        if (errors->hasErrors())
-            return nullptr;
-        return result;
-    }
-
-    void addItem(std::unique_ptr<T> value)
-    {
-        m_vector.push_back(std::move(value));
-    }
-
-    size_t length()
-    {
-        return m_vector.size();
-    }
-
-    T* get(size_t index)
-    {
-        return m_vector[index].get();
-    }
-
-    std::unique_ptr<protocol::ListValue> toValue()
-    {
-        std::unique_ptr<protocol::ListValue> result = ListValue::create();
-        for (auto& item : m_vector)
-            result->pushValue(ValueConversions<T>::toValue(item));
-        return result;
-    }
-
-private:
-    std::vector<std::unique_ptr<T>> m_vector;
-};
-
-template<typename T>
-class ArrayBase {
-public:
-    static std::unique_ptr<Array<T>> create()
-    {
-        return std::unique_ptr<Array<T>>(new Array<T>());
-    }
-
-    static std::unique_ptr<Array<T>> fromValue(protocol::Value* value, ErrorSupport* errors)
-    {
-        protocol::ListValue* array = ListValue::cast(value);
-        if (!array) {
-            errors->addError("array expected");
-            return nullptr;
-        }
-        errors->push();
-        std::unique_ptr<Array<T>> result(new Array<T>());
-        for (size_t i = 0; i < array->size(); ++i) {
-            errors->setName(StringUtil::fromInteger(i));
-            T item = ValueConversions<T>::fromValue(array->at(i), errors);
-            result->m_vector.push_back(item);
-        }
-        errors->pop();
-        if (errors->hasErrors())
-            return nullptr;
-        return result;
-    }
-
-    void addItem(const T& value)
-    {
-        m_vector.push_back(value);
-    }
-
-    size_t length()
-    {
-        return m_vector.size();
-    }
-
-    T get(size_t index)
-    {
-        return m_vector[index];
-    }
-
-    std::unique_ptr<protocol::ListValue> toValue()
-    {
-        std::unique_ptr<protocol::ListValue> result = ListValue::create();
-        for (auto& item : m_vector)
-            result->pushValue(ValueConversions<T>::toValue(item));
-        return result;
-    }
-
-private:
-    std::vector<T> m_vector;
-};
-
-template<> class Array<String> : public ArrayBase<String> {};
-template<> class Array<int> : public ArrayBase<int> {};
-template<> class Array<double> : public ArrayBase<double> {};
-template<> class Array<bool> : public ArrayBase<bool> {};
-
-{% for namespace in config.protocol.namespace %}
-} // namespace {{namespace}}
-{% endfor %}
-
-#endif // !defined({{"_".join(config.protocol.namespace)}}_Array_h)
diff --git a/tools/inspector_protocol/lib/Forward_h.template b/tools/inspector_protocol/lib/Forward_h.template
index 746ba20bba15f4..a6c4b12feca013 100644
--- a/tools/inspector_protocol/lib/Forward_h.template
+++ b/tools/inspector_protocol/lib/Forward_h.template
@@ -22,7 +22,6 @@
 namespace {{namespace}} {
 {% endfor %}
 
-template<typename T> class Array;
 class DictionaryValue;
 class DispatchResponse;
 class ErrorSupport;
@@ -35,6 +34,26 @@ class StringValue;
 class UberDispatcher;
 class Value;
 
+namespace detail {
+template <typename T>
+struct ArrayTypedef { typedef std::vector<std::unique_ptr<T>> type; };
+
+template <>
+struct ArrayTypedef<String> { typedef std::vector<String> type; };
+
+template <>
+struct ArrayTypedef<int> { typedef std::vector<int> type; };
+
+template <>
+struct ArrayTypedef<double> { typedef std::vector<double> type; };
+
+template <>
+struct ArrayTypedef<bool> { typedef std::vector<bool> type; };
+}  // namespace detail
+
+template <typename T>
+using Array = typename detail::ArrayTypedef<T>::type;
+
 {% for namespace in config.protocol.namespace %}
 } // namespace {{namespace}}
 {% endfor %}
diff --git a/tools/inspector_protocol/lib/ValueConversions_h.template b/tools/inspector_protocol/lib/ValueConversions_h.template
index 2ee5b724545a33..63baf689c6e11c 100644
--- a/tools/inspector_protocol/lib/ValueConversions_h.template
+++ b/tools/inspector_protocol/lib/ValueConversions_h.template
@@ -128,6 +128,72 @@ struct ValueConversions<Binary> {
     }
 };
 
+template<typename T>
+struct ValueConversions<std::vector<std::unique_ptr<T>>> {
+    static std::unique_ptr<std::vector<std::unique_ptr<T>>> fromValue(protocol::Value* value, ErrorSupport* errors) {
+        protocol::ListValue* array = ListValue::cast(value);
+        if (!array) {
+            errors->addError("array expected");
+            return nullptr;
+        }
+        errors->push();
+        std::unique_ptr<std::vector<std::unique_ptr<T>>> result(
+            new std::vector<std::unique_ptr<T>>());
+        result->reserve(array->size());
+        for (size_t i = 0; i < array->size(); ++i) {
+            errors->setName(StringUtil::fromInteger(i));
+            auto item = ValueConversions<T>::fromValue(array->at(i), errors);
+            result->emplace_back(std::move(item));
+        }
+        errors->pop();
+        if (errors->hasErrors())
+            return nullptr;
+        return result;
+    }
+
+    static std::unique_ptr<protocol::ListValue> toValue(std::vector<std::unique_ptr<T>>* v)
+    {
+        std::unique_ptr<protocol::ListValue> result = ListValue::create();
+        result->reserve(v->size());
+        for (auto& item : *v)
+            result->pushValue(ValueConversions<T>::toValue(item.get()));
+        return result;
+    }
+
+};
+
+template<typename T>
+struct ValueConversions<std::vector<T>> {
+    static std::unique_ptr<std::vector<T>> fromValue(protocol::Value* value, ErrorSupport* errors) {
+        protocol::ListValue* array = ListValue::cast(value);
+        if (!array) {
+            errors->addError("array expected");
+            return nullptr;
+        }
+        errors->push();
+        std::unique_ptr<std::vector<T>> result(new std::vector<T>());
+        result->reserve(array->size());
+        for (size_t i = 0; i < array->size(); ++i) {
+            errors->setName(StringUtil::fromInteger(i));
+            auto item = ValueConversions<T>::fromValue(array->at(i), errors);
+            result->emplace_back(std::move(item));
+        }
+        errors->pop();
+        if (errors->hasErrors())
+            return nullptr;
+        return result;
+    }
+
+    static std::unique_ptr<protocol::ListValue> toValue(std::vector<T>* v)
+    {
+        std::unique_ptr<protocol::ListValue> result = ListValue::create();
+        result->reserve(v->size());
+        for (auto& item : *v)
+            result->pushValue(ValueConversions<T>::toValue(item));
+        return result;
+    }
+};
+
 template<>
 struct ValueConversions<Value> {
     static std::unique_ptr<Value> fromValue(protocol::Value* value, ErrorSupport* errors)
diff --git a/tools/inspector_protocol/lib/Values_h.template b/tools/inspector_protocol/lib/Values_h.template
index 4a2e58f4cd6850..4d6fde07d4df2c 100644
--- a/tools/inspector_protocol/lib/Values_h.template
+++ b/tools/inspector_protocol/lib/Values_h.template
@@ -271,6 +271,7 @@ public:
 
     Value* at(size_t index);
     size_t size() const { return m_data.size(); }
+    void reserve(size_t capacity) { m_data.reserve(capacity); }
 
 private:
     ListValue();