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