allocator cleanup: remove memory benchmarking extension

content/renderer/memory_benchmarking_extension.h

Index: content/renderer/memory_benchmarking_extension.h
diff --git a/content/renderer/memory_benchmarking_extension.h b/content/renderer/memory_benchmarking_extension.h
deleted file mode 100644
index af7f4f25e2e1a5794c2a72de28f0b5d41f3ac6ee..0000000000000000000000000000000000000000
--- a/content/renderer/memory_benchmarking_extension.h
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright (c) 2013 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 CONTENT_RENDERER_MEMORY_BENCHMARKING_EXTENSION_H_
-#define CONTENT_RENDERER_MEMORY_BENCHMARKING_EXTENSION_H_
-
-#include "base/macros.h"
-#include "gin/wrappable.h"
-
-namespace blink {
-class WebFrame;
-}
-
-namespace gin {
-class Arguments;
-}
-
-namespace content {
-
-class MemoryBenchmarkingExtension
-    : public gin::Wrappable<MemoryBenchmarkingExtension> {
- public:
-  static gin::WrapperInfo kWrapperInfo;
-
-  static void Install(blink::WebFrame* frame);
-
- private:
-  MemoryBenchmarkingExtension();
-  ~MemoryBenchmarkingExtension() override;
-
-  // gin::Wrappable.
-  gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
-      v8::Isolate* isolate) override;
-
-  bool IsHeapProfilerRunning();
-
-  void HeapProfilerDump(gin::Arguments* args);
-
-  DISALLOW_COPY_AND_ASSIGN(MemoryBenchmarkingExtension);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_MEMORY_BENCHMARKING_EXTENSION_H_