Re-land: cc: Remove WorkerPool class and instead use TaskGraphRunner directly.

cc/resources/picture_pile_impl.cc

 // Copyright 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 <algorithm>
 #include <limits>
 
 #include "base/debug/trace_event.h"
 #include "cc/base/region.h"
 #include "cc/debug/debug_colors.h"
 #include "cc/resources/picture_pile_impl.h"
-#include "cc/resources/worker_pool.h"
+#include "cc/resources/raster_worker_pool.h"
 #include "skia/ext/analysis_canvas.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkSize.h"
 #include "ui/gfx/rect_conversions.h"
 #include "ui/gfx/size_conversions.h"
 #include "ui/gfx/skia_util.h"
 
 namespace cc {
 
 PicturePileImpl::ClonesForDrawing::ClonesForDrawing(
@@ skipping 22 matching lines @@
   return make_scoped_refptr(new PicturePileImpl(other, thread_index));
 }
 
 PicturePileImpl::PicturePileImpl()
     : clones_for_drawing_(ClonesForDrawing(this, 0)) {
 }
 
 PicturePileImpl::PicturePileImpl(const PicturePileBase* other)
     : PicturePileBase(other),
       clones_for_drawing_(ClonesForDrawing(
-                              this, WorkerPool::GetNumRasterThreads())) {
+                              this, RasterWorkerPool::GetNumRasterThreads())) {
 }
 
 PicturePileImpl::PicturePileImpl(
     const PicturePileImpl* other, unsigned thread_index)
     : PicturePileBase(other, thread_index),
       clones_for_drawing_(ClonesForDrawing(this, 0)) {
 }
 
 PicturePileImpl::~PicturePileImpl() {
 }
@@ skipping 341 matching lines @@
        ++it) {
     Picture* picture = it->second.GetPicture();
     if (picture && (processed_pictures.count(picture) == 0)) {
       picture->EmitTraceSnapshot();
       processed_pictures.insert(picture);
     }
   }
 }
 
 }  // namespace cc