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

gpu/ipc/service/gpu_memory_manager.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_manager.h"
-
-#include <algorithm>
-
-#include "base/bind.h"
-#include "base/command_line.h"
-#include "base/message_loop/message_loop.h"
-#include "base/process/process_handle.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/trace_event/trace_event.h"
-#include "gpu/command_buffer/common/gpu_memory_allocation.h"
-#include "gpu/command_buffer/service/gpu_switches.h"
-#include "gpu/ipc/common/gpu_memory_uma_stats.h"
-#include "gpu/ipc/common/memory_stats.h"
-#include "gpu/ipc/service/gpu_channel_manager.h"
-#include "gpu/ipc/service/gpu_channel_manager_delegate.h"
-#include "gpu/ipc/service/gpu_memory_tracking.h"
-
-namespace gpu {
-namespace {
-
-const uint64_t kBytesAllocatedStep = 16 * 1024 * 1024;
-
-void TrackValueChanged(uint64_t old_size,
-                       uint64_t new_size,
-                       uint64_t* total_size) {
-  DCHECK(new_size > old_size || *total_size >= (old_size - new_size));
-  *total_size += (new_size - old_size);
-}
-
-}
-
-GpuMemoryManager::GpuMemoryManager(GpuChannelManager* channel_manager)
-    : channel_manager_(channel_manager),
-      bytes_allocated_current_(0),
-      bytes_allocated_historical_max_(0) {}
-
-GpuMemoryManager::~GpuMemoryManager() {
-  DCHECK(tracking_groups_.empty());
-  DCHECK(!bytes_allocated_current_);
-}
-
-void GpuMemoryManager::TrackMemoryAllocatedChange(
-    GpuMemoryTrackingGroup* tracking_group,
-    uint64_t old_size,
-    uint64_t new_size) {
-  TrackValueChanged(old_size, new_size, &tracking_group->size_);
-  TrackValueChanged(old_size, new_size, &bytes_allocated_current_);
-
-  if (GetCurrentUsage() > bytes_allocated_historical_max_ +
-                          kBytesAllocatedStep) {
-      bytes_allocated_historical_max_ = GetCurrentUsage();
-      // If we're blowing into new memory usage territory, spam the browser
-      // process with the most up-to-date information about our memory usage.
-      SendUmaStatsToHost();
-  }
-}
-
-bool GpuMemoryManager::EnsureGPUMemoryAvailable(uint64_t /* size_needed */) {
-  // TODO: Check if there is enough space. Lose contexts until there is.
-  return true;
-}
-
-uint64_t GpuMemoryManager::GetTrackerMemoryUsage(
-    gles2::MemoryTracker* tracker) const {
-  TrackingGroupMap::const_iterator tracking_group_it =
-      tracking_groups_.find(tracker);
-  DCHECK(tracking_group_it != tracking_groups_.end());
-  return tracking_group_it->second->GetSize();
-}
-
-GpuMemoryTrackingGroup* GpuMemoryManager::CreateTrackingGroup(
-    base::ProcessId pid, gles2::MemoryTracker* memory_tracker) {
-  GpuMemoryTrackingGroup* tracking_group = new GpuMemoryTrackingGroup(
-      pid, memory_tracker, this);
-  DCHECK(!tracking_groups_.count(tracking_group->GetMemoryTracker()));
-  tracking_groups_.insert(std::make_pair(tracking_group->GetMemoryTracker(),
-                                         tracking_group));
-  return tracking_group;
-}
-
-void GpuMemoryManager::OnDestroyTrackingGroup(
-    GpuMemoryTrackingGroup* tracking_group) {
-  DCHECK(tracking_groups_.count(tracking_group->GetMemoryTracker()));
-  tracking_groups_.erase(tracking_group->GetMemoryTracker());
-}
-
-void GpuMemoryManager::GetVideoMemoryUsageStats(
-    VideoMemoryUsageStats* video_memory_usage_stats) const {
-  // For each context group, assign its memory usage to its PID
-  video_memory_usage_stats->process_map.clear();
-  for (TrackingGroupMap::const_iterator i =
-       tracking_groups_.begin(); i != tracking_groups_.end(); ++i) {
-    const GpuMemoryTrackingGroup* tracking_group = i->second;
-    video_memory_usage_stats->process_map[
-        tracking_group->GetPid()].video_memory += tracking_group->GetSize();
-  }
-
-  // Assign the total across all processes in the GPU process
-  video_memory_usage_stats->process_map[
-      base::GetCurrentProcId()].video_memory = GetCurrentUsage();
-  video_memory_usage_stats->process_map[
-      base::GetCurrentProcId()].has_duplicates = true;
-
-  video_memory_usage_stats->bytes_allocated = GetCurrentUsage();
-  video_memory_usage_stats->bytes_allocated_historical_max =
-      bytes_allocated_historical_max_;
-}
-
-void GpuMemoryManager::SendUmaStatsToHost() {
-  if (!channel_manager_)
-    return;
-  GPUMemoryUmaStats params;
-  params.bytes_allocated_current = GetCurrentUsage();
-  params.bytes_allocated_max = bytes_allocated_historical_max_;
-  params.context_group_count = static_cast<uint32_t>(tracking_groups_.size());
-  channel_manager_->delegate()->GpuMemoryUmaStats(params);
-}
-}  // namespace gpu