cc: Simplify task and its derived classes.

cc/raster/one_copy_tile_task_worker_pool.cc

 // Copyright 2014 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/raster/one_copy_tile_task_worker_pool.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <limits>
 #include <utility>
 
 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "cc/base/container_util.h"
 #include "cc/base/math_util.h"
 #include "cc/debug/traced_value.h"
-#include "cc/raster/raster_buffer.h"
 #include "cc/resources/platform_color.h"
 #include "cc/resources/resource_format.h"
 #include "cc/resources/resource_util.h"
 #include "cc/resources/scoped_resource.h"
 #include "gpu/GLES2/gl2extchromium.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
 #include "ui/gfx/buffer_format_util.h"
 
 namespace cc {
@@ skipping 216 matching lines @@
     return;
 
   ReleaseBuffersNotUsedSince(base::TimeTicks() + base::TimeDelta::Max());
   DCHECK_EQ(staging_buffer_usage_in_bytes_, 0);
   DCHECK_EQ(free_staging_buffer_usage_in_bytes_, 0);
 }
 
 void OneCopyTileTaskWorkerPool::ScheduleTasks(TaskGraph* graph) {
   TRACE_EVENT0("cc", "OneCopyTileTaskWorkerPool::ScheduleTasks");
 
-  ScheduleTasksOnOriginThread(this, graph);
+  ScheduleTasksOnOriginThread(graph);
 
   // Barrier to sync any new resources to the worker context.
   resource_provider_->output_surface()
       ->context_provider()
       ->ContextGL()
       ->OrderingBarrierCHROMIUM();
 
   task_graph_runner_->ScheduleTasks(namespace_token_, graph);
 }
 
 void OneCopyTileTaskWorkerPool::CheckForCompletedTasks() {
   TRACE_EVENT0("cc", "OneCopyTileTaskWorkerPool::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* task = it->get();
 
     task->WillComplete();
-    task->CompleteOnOriginThread(this);
+    task->CompleteOnOriginThread();
     task->DidComplete();
   }
   completed_tasks_.clear();
 }
 
 ResourceFormat OneCopyTileTaskWorkerPool::GetResourceFormat(
     bool must_support_alpha) const {
   if (resource_provider_->IsResourceFormatSupported(preferred_tile_format_) &&
       (DoesResourceFormatSupportAlpha(preferred_tile_format_) ||
        !must_support_alpha)) {
@@ skipping 445 matching lines @@
         return;
 
       busy_buffers_.front()->DestroyGLResources(gl);
       RemoveStagingBuffer(busy_buffers_.front().get());
       busy_buffers_.pop_front();
     }
   }
 }
 
 }  // namespace cc