Move SharedBitmapManager implementation out of content/

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 <stddef.h>
-
-#include <map>
-#include <memory>
-#include <set>
-
-#include "base/containers/hash_tables.h"
-#include "base/hash.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.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));
-  }
-};
-}  // namespace BASE_HASH_NAMESPACE
-
-namespace content {
-class BitmapData;
-class HostSharedBitmapManager;
-
-class CONTENT_EXPORT HostSharedBitmapManagerClient {
- public:
-  explicit HostSharedBitmapManagerClient(HostSharedBitmapManager* manager);
-
-  ~HostSharedBitmapManagerClient();
-
-  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,
-                                  const cc::SharedBitmapId& id);
-  void ChildDeletedSharedBitmap(const cc::SharedBitmapId& id);
-
- private:
-  HostSharedBitmapManager* manager_;
-
-  // Lock must be held around access to owned_bitmaps_.
-  base::Lock lock_;
-  base::hash_set<cc::SharedBitmapId> owned_bitmaps_;
-
-  DISALLOW_COPY_AND_ASSIGN(HostSharedBitmapManagerClient);
-};
-
-class CONTENT_EXPORT HostSharedBitmapManager
-    : public cc::SharedBitmapManager,
-      public base::trace_event::MemoryDumpProvider {
- public:
-  HostSharedBitmapManager();
-  ~HostSharedBitmapManager() override;
-
-  static HostSharedBitmapManager* current();
-
-  // cc::SharedBitmapManager implementation.
-  std::unique_ptr<cc::SharedBitmap> AllocateSharedBitmap(
-      const gfx::Size& size) override;
-  std::unique_ptr<cc::SharedBitmap> GetSharedBitmapFromId(
-      const gfx::Size& size,
-      const cc::SharedBitmapId&) override;
-
-  // base::trace_event::MemoryDumpProvider implementation.
-  bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
-                    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,
-      const cc::SharedBitmapId& id,
-      base::SharedMemoryHandle* shared_memory_handle);
-  bool ChildAllocatedSharedBitmap(size_t buffer_size,
-                                  const base::SharedMemoryHandle& handle,
-                                  const cc::SharedBitmapId& id);
-  void ChildDeletedSharedBitmap(const cc::SharedBitmapId& id);
-
-  mutable base::Lock lock_;
-
-  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_