cc: Refactor WorkerPoolTaskClient::AcquireBufferForRaster

cc/resources/image_raster_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/image_raster_worker_pool.h"
 
 #include "base/debug/trace_event.h"
 #include "base/values.h"
 #include "cc/debug/traced_value.h"
 #include "cc/resources/resource.h"
@@ skipping 122 matching lines @@
     task->CompleteOnOriginThread(this);
     task->DidComplete();
 
     task->RunReplyOnOriginThread();
   }
   completed_tasks_.clear();
 
   CheckForCompletedGpuRasterTasks();
 }
 
-void* ImageRasterWorkerPool::AcquireBufferForRaster(
-    internal::RasterWorkerPoolTask* task,
-    int* stride) {
-  // Acquire image for resource.
-  resource_provider()->AcquireImage(task->resource()->id());
+SkCanvas* ImageRasterWorkerPool::AcquireCanvasForRaster(
+    internal::RasterWorkerPoolTask* task) {
+  if (task->use_gpu_rasterization())
+    return resource_provider()->MapDirectRasterBuffer(task->resource()->id());
 
-  *stride = resource_provider()->GetImageStride(task->resource()->id());
-  return resource_provider()->MapImage(task->resource()->id());
+  return resource_provider()->MapImageRasterBuffer(task->resource()->id());
 }
 
 void ImageRasterWorkerPool::OnRasterCompleted(
     internal::RasterWorkerPoolTask* task,
     const PicturePileImpl::Analysis& analysis) {
-  resource_provider()->UnmapImage(task->resource()->id());
+  if (task->use_gpu_rasterization()) {
+    resource_provider()->UnmapDirectRasterBuffer(task->resource()->id());
+    return;
+  }
+  resource_provider()->UnmapImageRasterBuffer(task->resource()->id());
 }
 
 void ImageRasterWorkerPool::OnImageDecodeCompleted(
     internal::WorkerPoolTask* task) {}
 
 void ImageRasterWorkerPool::OnRasterTasksFinished() {
   DCHECK(raster_tasks_pending_);
   raster_tasks_pending_ = false;
   TRACE_EVENT_ASYNC_END0("cc", "ScheduledTasks", this);
   client()->DidFinishRunningTasks();
@@ skipping 14 matching lines @@
 
 scoped_ptr<base::Value> ImageRasterWorkerPool::StateAsValue() const {
   scoped_ptr<base::DictionaryValue> state(new base::DictionaryValue);
 
   state->SetBoolean("tasks_required_for_activation_pending",
                     raster_tasks_required_for_activation_pending_);
   return state.PassAs<base::Value>();
 }
 
 }  // namespace cc