[tracing] Remove memory-infra plumbing classes for blink

content/child/web_memory_allocator_dump_impl.h

-// Copyright 2015 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_CHILD_WEB_MEMORY_ALLOCATOR_DUMP_IMPL_H_
-#define CONTENT_CHILD_WEB_MEMORY_ALLOCATOR_DUMP_IMPL_H_
-
-#include "third_party/WebKit/public/platform/WebMemoryAllocatorDump.h"
-
-namespace base {
-namespace trace_event {
-class MemoryAllocatorDump;
-}  // namespace base
-}  // namespace trace_event
-
-namespace content {
-
-// Implements the blink::WebMemoryAllocatorDump interface by means of proxying
-// the Add*() calls to the underlying base::trace_event::MemoryAllocatorDump
-// instance.
-class WebMemoryAllocatorDumpImpl : public blink::WebMemoryAllocatorDump {
- public:
-  explicit WebMemoryAllocatorDumpImpl(
-      base::trace_event::MemoryAllocatorDump* memory_allocator_dump);
-  ~WebMemoryAllocatorDumpImpl() override;
-
-  // blink::WebMemoryAllocatorDump implementation.
-  void AddScalar(const char* name, const char* units, uint64 value) override;
-  void AddScalarF(const char* name, const char* units, double value) override;
-  void AddString(const char* name,
-                 const char* units,
-                 const blink::WebString& value) override;
-
-  blink::WebMemoryAllocatorDumpGuid guid() const override;
-
- private:
-  base::trace_event::MemoryAllocatorDump* memory_allocator_dump_;  // Not owned.
-  blink::WebMemoryAllocatorDumpGuid guid_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebMemoryAllocatorDumpImpl);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_WEB_MEMORY_ALLOCATOR_DUMP_IMPL_H_