Add shared bitmap managers for browser and renderer processes.

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/compiler_specific.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 "cc/resources/shared_bitmap_manager.h"
+#include "content/common/content_export.h"
+
+struct SurfaceData;
+
+namespace content {
+class BitmapData;
+
+class CONTENT_EXPORT HostSharedBitmapManager : public cc::SharedBitmapManager {
+ public:
+  HostSharedBitmapManager();
+  virtual ~HostSharedBitmapManager();
+
+  static HostSharedBitmapManager* current();
+
+  // cc::SharedBitmapManager implementation.
+  virtual scoped_ptr<cc::SharedBitmap> AllocateSharedBitmap(
+      const gfx::Size& size) OVERRIDE;
+  virtual scoped_ptr<cc::SharedBitmap> GetSharedBitmapFromId(
+      const gfx::Size& size,
+      const cc::SharedBitmapId&) OVERRIDE;
+  virtual scoped_ptr<cc::SharedBitmap> GetBitmapForSharedMemory(
+      base::SharedMemory*) OVERRIDE;
+
+  void AllocateSharedBitmapForChild(
+      base::ProcessHandle process_handle,
+      size_t buffer_size,
+      const cc::SharedBitmapId& id,
+      base::SharedMemoryHandle* shared_memory_handle);
+  void ChildAllocatedSharedBitmap(size_t buffer_size,
+                                  const base::SharedMemoryHandle& handle,
+                                  base::ProcessHandle process_handle,
+                                  const cc::SharedBitmapId& id);
+  void ChildDeletedSharedBitmap(const cc::SharedBitmapId& id);
+  void ProcessRemoved(base::ProcessHandle process_handle);
+
+ private:
+  base::Lock lock_;
+
+  typedef std::map<cc::SharedBitmapId, scoped_refptr<BitmapData> > BitmapMap;

[piman, 2014/02/18 21:38:20]

nit: hash_map is probably faster (and uses less memory).

+  BitmapMap handle_map_;
+
+  typedef std::map<base::ProcessHandle, std::set<cc::SharedBitmapId> >

[piman, 2014/02/18 21:38:20]

nit: hash_map, hash_set

+      ProcessMap;
+  ProcessMap process_map_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_HOST_SHARED_BITMAP_MANAGER_H_