Revert of Refactor content/common/gpu into gpu/ipc/service

gpu/ipc/service/gpu_memory_manager.h

-// Copyright (c) 2012 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 GPU_IPC_SERVICE_GPU_MEMORY_MANAGER_H_
-#define GPU_IPC_SERVICE_GPU_MEMORY_MANAGER_H_
-
-#include <stdint.h>
-
-#include <list>
-#include <map>
-
-#include "base/cancelable_callback.h"
-#include "base/containers/hash_tables.h"
-#include "base/gtest_prod_util.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "gpu/command_buffer/common/gpu_memory_allocation.h"
-#include "gpu/command_buffer/service/memory_tracking.h"
-#include "gpu/gpu_export.h"
-
-namespace gpu {
-
-class GpuChannelManager;
-class GpuMemoryTrackingGroup;
-struct VideoMemoryUsageStats;
-
-class GPU_EXPORT GpuMemoryManager :
-    public base::SupportsWeakPtr<GpuMemoryManager> {
- public:
-  explicit GpuMemoryManager(GpuChannelManager* channel_manager);
-  ~GpuMemoryManager();
-
-  // Retrieve GPU Resource consumption statistics for the task manager
-  void GetVideoMemoryUsageStats(
-      VideoMemoryUsageStats* video_memory_usage_stats) const;
-
-  GpuMemoryTrackingGroup* CreateTrackingGroup(
-      base::ProcessId pid, gles2::MemoryTracker* memory_tracker);
-
-  uint64_t GetTrackerMemoryUsage(gles2::MemoryTracker* tracker) const;
-
- private:
-  friend class GpuMemoryManagerTest;
-  friend class GpuMemoryTrackingGroup;
-  friend class GpuMemoryManagerClientState;
-
-  typedef std::map<gles2::MemoryTracker*, GpuMemoryTrackingGroup*>
-      TrackingGroupMap;
-
-  // Send memory usage stats to the browser process.
-  void SendUmaStatsToHost();
-
-  // Get the current number of bytes allocated.
-  uint64_t GetCurrentUsage() const { return bytes_allocated_current_; }
-
-  // GpuMemoryTrackingGroup interface
-  void TrackMemoryAllocatedChange(GpuMemoryTrackingGroup* tracking_group,
-                                  uint64_t old_size,
-                                  uint64_t new_size);
-  void OnDestroyTrackingGroup(GpuMemoryTrackingGroup* tracking_group);
-  bool EnsureGPUMemoryAvailable(uint64_t size_needed);
-
-  GpuChannelManager* channel_manager_;
-
-  // All context groups' tracking structures
-  TrackingGroupMap tracking_groups_;
-
-  // The current total memory usage, and historical maximum memory usage
-  uint64_t bytes_allocated_current_;
-  uint64_t bytes_allocated_historical_max_;
-
-  DISALLOW_COPY_AND_ASSIGN(GpuMemoryManager);
-};
-
-}  // namespace gpu
-
-#endif  // GPU_IPC_SERVICE_GPU_MEMORY_MANAGER_H_