Moving platform tracing things into platform/tracing.

third_party/WebKit/Source/platform/MemoryCacheDumpProvider.cpp

-// 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.
-
-#include "platform/MemoryCacheDumpProvider.h"
-
-namespace blink {
-
-DEFINE_TRACE(MemoryCacheDumpClient) {}
-
-MemoryCacheDumpProvider* MemoryCacheDumpProvider::instance() {
-  DEFINE_STATIC_LOCAL(MemoryCacheDumpProvider, instance, ());
-  return &instance;
-}
-
-bool MemoryCacheDumpProvider::OnMemoryDump(
-    const base::trace_event::MemoryDumpArgs& args,
-    base::trace_event::ProcessMemoryDump* memoryDump) {
-  DCHECK(isMainThread());
-  if (!m_client)
-    return false;
-
-  WebMemoryDumpLevelOfDetail level;
-  switch (args.level_of_detail) {
-    case base::trace_event::MemoryDumpLevelOfDetail::BACKGROUND:
-      level = blink::WebMemoryDumpLevelOfDetail::Background;
-      break;
-    case base::trace_event::MemoryDumpLevelOfDetail::LIGHT:
-      level = blink::WebMemoryDumpLevelOfDetail::Light;
-      break;
-    case base::trace_event::MemoryDumpLevelOfDetail::DETAILED:
-      level = blink::WebMemoryDumpLevelOfDetail::Detailed;
-      break;
-    default:
-      NOTREACHED();
-      return false;
-  }
-
-  WebProcessMemoryDump dump(args.level_of_detail, memoryDump);
-  return m_client->onMemoryDump(level, &dump);
-}
-
-MemoryCacheDumpProvider::MemoryCacheDumpProvider() {}
-
-MemoryCacheDumpProvider::~MemoryCacheDumpProvider() {}
-
-}  // namespace blink