Remove parts of //cc we aren't using

cc/resources/zero_copy_tile_task_worker_pool.cc

-// Copyright 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.
-
-#include "cc/resources/zero_copy_tile_task_worker_pool.h"
-
-#include <algorithm>
-
-#include "base/strings/stringprintf.h"
-#include "base/trace_event/trace_event.h"
-#include "base/trace_event/trace_event_argument.h"
-#include "cc/debug/traced_value.h"
-#include "cc/resources/raster_buffer.h"
-#include "cc/resources/resource.h"
-#include "ui/gfx/gpu_memory_buffer.h"
-
-namespace cc {
-namespace {
-
-class RasterBufferImpl : public RasterBuffer {
- public:
-  RasterBufferImpl(ResourceProvider* resource_provider,
-                   const Resource* resource)
-      : lock_(resource_provider, resource->id()), resource_(resource) {}
-
-  // Overridden from RasterBuffer:
-  void Playback(const RasterSource* raster_source,
-                const gfx::Rect& rect,
-                float scale) override {
-    gfx::GpuMemoryBuffer* gpu_memory_buffer = lock_.GetGpuMemoryBuffer();
-    if (!gpu_memory_buffer)
-      return;
-
-    TileTaskWorkerPool::PlaybackToMemory(
-        gpu_memory_buffer->Map(), resource_->format(), resource_->size(),
-        gpu_memory_buffer->GetStride(), raster_source, rect, scale);
-    gpu_memory_buffer->Unmap();
-  }
-
- private:
-  ResourceProvider::ScopedWriteLockGpuMemoryBuffer lock_;
-  const Resource* resource_;
-
-  DISALLOW_COPY_AND_ASSIGN(RasterBufferImpl);
-};
-
-}  // namespace
-
-// static
-scoped_ptr<TileTaskWorkerPool> ZeroCopyTileTaskWorkerPool::Create(
-    base::SequencedTaskRunner* task_runner,
-    TaskGraphRunner* task_graph_runner,
-    ResourceProvider* resource_provider) {
-  return make_scoped_ptr<TileTaskWorkerPool>(new ZeroCopyTileTaskWorkerPool(
-      task_runner, task_graph_runner, resource_provider));
-}
-
-ZeroCopyTileTaskWorkerPool::ZeroCopyTileTaskWorkerPool(
-    base::SequencedTaskRunner* task_runner,
-    TaskGraphRunner* task_graph_runner,
-    ResourceProvider* resource_provider)
-    : task_runner_(task_runner),
-      task_graph_runner_(task_graph_runner),
-      namespace_token_(task_graph_runner->GetNamespaceToken()),
-      resource_provider_(resource_provider),
-      task_set_finished_weak_ptr_factory_(this) {
-}
-
-ZeroCopyTileTaskWorkerPool::~ZeroCopyTileTaskWorkerPool() {
-}
-
-TileTaskRunner* ZeroCopyTileTaskWorkerPool::AsTileTaskRunner() {
-  return this;
-}
-
-void ZeroCopyTileTaskWorkerPool::SetClient(TileTaskRunnerClient* client) {
-  client_ = client;
-}
-
-void ZeroCopyTileTaskWorkerPool::Shutdown() {
-  TRACE_EVENT0("cc", "ZeroCopyTileTaskWorkerPool::Shutdown");
-
-  TaskGraph empty;
-  task_graph_runner_->ScheduleTasks(namespace_token_, &empty);
-  task_graph_runner_->WaitForTasksToFinishRunning(namespace_token_);
-}
-
-void ZeroCopyTileTaskWorkerPool::ScheduleTasks(TileTaskQueue* queue) {
-  TRACE_EVENT0("cc", "ZeroCopyTileTaskWorkerPool::ScheduleTasks");
-
-  if (tasks_pending_.none())
-    TRACE_EVENT_ASYNC_BEGIN0("cc", "ScheduledTasks", this);
-
-  // Mark all task sets as pending.
-  tasks_pending_.set();
-
-  unsigned priority = kTileTaskPriorityBase;
-
-  graph_.Reset();
-
-  // Cancel existing OnTaskSetFinished callbacks.
-  task_set_finished_weak_ptr_factory_.InvalidateWeakPtrs();
-
-  scoped_refptr<TileTask> new_task_set_finished_tasks[kNumberOfTaskSets];
-
-  size_t task_count[kNumberOfTaskSets] = {0};
-
-  for (TaskSet task_set = 0; task_set < kNumberOfTaskSets; ++task_set) {
-    new_task_set_finished_tasks[task_set] = CreateTaskSetFinishedTask(
-        task_runner_.get(),
-        base::Bind(&ZeroCopyTileTaskWorkerPool::OnTaskSetFinished,
-                   task_set_finished_weak_ptr_factory_.GetWeakPtr(), task_set));
-  }
-
-  for (TileTaskQueue::Item::Vector::const_iterator it = queue->items.begin();
-       it != queue->items.end(); ++it) {
-    const TileTaskQueue::Item& item = *it;
-    RasterTask* task = item.task;
-    DCHECK(!task->HasCompleted());
-
-    for (TaskSet task_set = 0; task_set < kNumberOfTaskSets; ++task_set) {
-      if (!item.task_sets[task_set])
-        continue;
-
-      ++task_count[task_set];
-
-      graph_.edges.push_back(
-          TaskGraph::Edge(task, new_task_set_finished_tasks[task_set].get()));
-    }
-
-    InsertNodesForRasterTask(&graph_, task, task->dependencies(), priority++);
-  }
-
-  for (TaskSet task_set = 0; task_set < kNumberOfTaskSets; ++task_set) {
-    InsertNodeForTask(&graph_, new_task_set_finished_tasks[task_set].get(),
-                      kTaskSetFinishedTaskPriorityBase + task_set,
-                      task_count[task_set]);
-  }
-
-  ScheduleTasksOnOriginThread(this, &graph_);
-  task_graph_runner_->ScheduleTasks(namespace_token_, &graph_);
-
-  std::copy(new_task_set_finished_tasks,
-            new_task_set_finished_tasks + kNumberOfTaskSets,
-            task_set_finished_tasks_);
-
-  TRACE_EVENT_ASYNC_STEP_INTO1("cc", "ScheduledTasks", this, "running", "state",
-                               StateAsValue());
-}
-
-void ZeroCopyTileTaskWorkerPool::CheckForCompletedTasks() {
-  TRACE_EVENT0("cc", "ZeroCopyTileTaskWorkerPool::CheckForCompletedTasks");
-
-  task_graph_runner_->CollectCompletedTasks(namespace_token_,
-                                            &completed_tasks_);
-  for (Task::Vector::const_iterator it = completed_tasks_.begin();
-       it != completed_tasks_.end(); ++it) {
-    TileTask* task = static_cast<TileTask*>(it->get());
-
-    task->WillComplete();
-    task->CompleteOnOriginThread(this);
-    task->DidComplete();
-
-    task->RunReplyOnOriginThread();
-  }
-  completed_tasks_.clear();
-}
-
-ResourceFormat ZeroCopyTileTaskWorkerPool::GetResourceFormat() {
-  return resource_provider_->best_texture_format();
-}
-
-scoped_ptr<RasterBuffer> ZeroCopyTileTaskWorkerPool::AcquireBufferForRaster(
-    const Resource* resource) {
-  return make_scoped_ptr<RasterBuffer>(
-      new RasterBufferImpl(resource_provider_, resource));
-}
-
-void ZeroCopyTileTaskWorkerPool::ReleaseBufferForRaster(
-    scoped_ptr<RasterBuffer> buffer) {
-  // Nothing to do here. RasterBufferImpl destructor cleans up after itself.
-}
-
-void ZeroCopyTileTaskWorkerPool::OnTaskSetFinished(TaskSet task_set) {
-  TRACE_EVENT1("cc", "ZeroCopyTileTaskWorkerPool::OnTaskSetFinished",
-               "task_set", task_set);
-
-  DCHECK(tasks_pending_[task_set]);
-  tasks_pending_[task_set] = false;
-  if (tasks_pending_.any()) {
-    TRACE_EVENT_ASYNC_STEP_INTO1("cc", "ScheduledTasks", this, "running",
-                                 "state", StateAsValue());
-  } else {
-    TRACE_EVENT_ASYNC_END0("cc", "ScheduledTasks", this);
-  }
-  client_->DidFinishRunningTileTasks(task_set);
-}
-
-scoped_refptr<base::trace_event::ConvertableToTraceFormat>
-ZeroCopyTileTaskWorkerPool::StateAsValue() const {
-  scoped_refptr<base::trace_event::TracedValue> state =
-      new base::trace_event::TracedValue();
-
-  state->BeginArray("tasks_pending");
-  for (TaskSet task_set = 0; task_set < kNumberOfTaskSets; ++task_set)
-    state->AppendBoolean(tasks_pending_[task_set]);
-  state->EndArray();
-  return state;
-}
-
-}  // namespace cc