Fix unused variables errors in cc/.

cc/raster/gpu_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/gpu_tile_task_worker_pool.h"
 
 #include <algorithm>
 
 #include "base/trace_event/trace_event.h"
 #include "cc/playback/raster_source.h"
@@ skipping 11 matching lines @@
 namespace {
 
 class RasterBufferImpl : public RasterBuffer {
  public:
   RasterBufferImpl(GpuRasterizer* rasterizer,
                    const Resource* resource,
                    uint64_t resource_content_id,
                    uint64_t previous_content_id)
       : rasterizer_(rasterizer),
         lock_(rasterizer->resource_provider(), resource->id()),
-        resource_(resource),
         resource_has_previous_content_(
             resource_content_id && resource_content_id == previous_content_id) {
   }
 
   // Overridden from RasterBuffer:
   void Playback(const RasterSource* raster_source,
                 const gfx::Rect& raster_full_rect,
                 const gfx::Rect& raster_dirty_rect,
                 uint64_t new_content_id,
                 float scale) override {
@@ skipping 24 matching lines @@
     // Barrier to sync worker context output to cc context.
     context_provider->ContextGL()->OrderingBarrierCHROMIUM();
 
     // Allow compositor thread to bind to context_provider.
     context_provider->DetachFromThread();
   }
 
  private:
   GpuRasterizer* rasterizer_;
   ResourceProvider::ScopedWriteLockGr lock_;
-  const Resource* resource_;
   bool resource_has_previous_content_;
 
   DISALLOW_COPY_AND_ASSIGN(RasterBufferImpl);
 };
 
 }  // namespace
 
 // static
 scoped_ptr<TileTaskWorkerPool> GpuTileTaskWorkerPool::Create(
     base::SequencedTaskRunner* task_runner,
@@ skipping 157 matching lines @@
 void GpuTileTaskWorkerPool::OnTaskSetFinished(TaskSet task_set) {
   TRACE_EVENT1("cc", "GpuTileTaskWorkerPool::OnTaskSetFinished", "task_set",
                task_set);
 
   DCHECK(tasks_pending_[task_set]);
   tasks_pending_[task_set] = false;
   client_->DidFinishRunningTileTasks(task_set);
 }
 
 }  // namespace cc