Revert of Add WebCache memory usage in Blink to chrome://tracing

components/web_cache/renderer/web_cache_memory_dump_provider.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 COMPONENTS_WEB_CACHE_RENDERER_WEB_CACHE_MEMORY_DUMP_PROVIDER_H
-#define COMPONENTS_WEB_CACHE_RENDERER_WEB_CACHE_MEMORY_DUMP_PROVIDER_H
-
-#include "base/lazy_instance.h"
-#include "base/trace_event/memory_dump_provider.h"
-
-namespace web_cache {
-
-class WebCacheMemoryDumpProvider
-    : public base::trace_event::MemoryDumpProvider {
- public:
-  static WebCacheMemoryDumpProvider* GetInstance();
-
-  // base::trace_event::MemoryDumpProvider implementation.
-  bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
-                    base::trace_event::ProcessMemoryDump* pmd) override;
-
- private:
-  friend struct base::DefaultLazyInstanceTraits<WebCacheMemoryDumpProvider>;
-
-  WebCacheMemoryDumpProvider();
-  ~WebCacheMemoryDumpProvider() override;
-
-  DISALLOW_COPY_AND_ASSIGN(WebCacheMemoryDumpProvider);
-};
-
-}  // namespace web_cache
-
-#endif  // COMPONENTS_WEB_CACHE_RENDERER_WEB_CACHE_MEMORY_DUMP_PROVIDER_H