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

gpu/ipc/service/gpu_memory_tracking.cc

-// 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.
-
-#include "gpu/ipc/service/gpu_memory_tracking.h"
-
-#include "gpu/ipc/service/gpu_memory_manager.h"
-
-namespace gpu {
-
-GpuMemoryTrackingGroup::GpuMemoryTrackingGroup(
-    base::ProcessId pid,
-    gles2::MemoryTracker* memory_tracker,
-    GpuMemoryManager* memory_manager)
-    : pid_(pid),
-      size_(0),
-      hibernated_(false),
-      memory_tracker_(memory_tracker),
-      memory_manager_(memory_manager) {
-}
-
-GpuMemoryTrackingGroup::~GpuMemoryTrackingGroup() {
-  memory_manager_->OnDestroyTrackingGroup(this);
-}
-
-void GpuMemoryTrackingGroup::TrackMemoryAllocatedChange(uint64_t old_size,
-                                                        uint64_t new_size) {
-  memory_manager_->TrackMemoryAllocatedChange(
-      this, old_size, new_size);
-}
-
-bool GpuMemoryTrackingGroup::EnsureGPUMemoryAvailable(uint64_t size_needed) {
-  return memory_manager_->EnsureGPUMemoryAvailable(size_needed);
-}
-
-
-}  // namespace gpu