content: Add SharedBitmap MemoryDumpProvider implementation.

content/common/host_shared_bitmap_manager.h

 // 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_COMMON_HOST_SHARED_BITMAP_MANAGER_H_
 #define CONTENT_COMMON_HOST_SHARED_BITMAP_MANAGER_H_
 
 #include <map>
 #include <set>
 
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
 #include "base/hash.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "base/synchronization/lock.h"
+#include "base/trace_event/memory_dump_provider.h"
 #include "cc/resources/shared_bitmap_manager.h"
 #include "content/common/content_export.h"
 
 namespace BASE_HASH_NAMESPACE {
 template <>
 struct hash<cc::SharedBitmapId> {
   size_t operator()(const cc::SharedBitmapId& id) const {
     return base::Hash(reinterpret_cast<const char*>(id.name), sizeof(id.name));
   }
 };
@@ skipping 20 matching lines @@
                                   const cc::SharedBitmapId& id);
   void ChildDeletedSharedBitmap(const cc::SharedBitmapId& id);
 
  private:
   HostSharedBitmapManager* manager_;
   base::hash_set<cc::SharedBitmapId> owned_bitmaps_;
 
   DISALLOW_COPY_AND_ASSIGN(HostSharedBitmapManagerClient);
 };
 
-class CONTENT_EXPORT HostSharedBitmapManager : public cc::SharedBitmapManager {
+class CONTENT_EXPORT HostSharedBitmapManager
+    : public cc::SharedBitmapManager,
+      public base::trace_event::MemoryDumpProvider {
  public:
   HostSharedBitmapManager();
   ~HostSharedBitmapManager() override;
 
   static HostSharedBitmapManager* current();
 
   // cc::SharedBitmapManager implementation.
   scoped_ptr<cc::SharedBitmap> AllocateSharedBitmap(
       const gfx::Size& size) override;
   scoped_ptr<cc::SharedBitmap> GetSharedBitmapFromId(
       const gfx::Size& size,
       const cc::SharedBitmapId&) override;
 
+  // base::trace_event::MemoryDumpProvider implementation.
+  bool OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd) override;
+
   size_t AllocatedBitmapCount() const;
 
   void FreeSharedMemoryFromMap(const cc::SharedBitmapId& id);
 
  private:
   friend class HostSharedBitmapManagerClient;
 
   void AllocateSharedBitmapForChild(
       base::ProcessHandle process_handle,
       size_t buffer_size,
@@ skipping 10 matching lines @@
   typedef base::hash_map<cc::SharedBitmapId, scoped_refptr<BitmapData> >
       BitmapMap;
   BitmapMap handle_map_;
 
   DISALLOW_COPY_AND_ASSIGN(HostSharedBitmapManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_HOST_SHARED_BITMAP_MANAGER_H_