Revert of cc: Remove use of PassAs() and constructor-casting with scoped_ptr.

cc/resources/tile_manager_perftest.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 "base/time/time.h"
 #include "cc/debug/lap_timer.h"
 #include "cc/resources/raster_buffer.h"
 #include "cc/resources/tile.h"
 #include "cc/resources/tile_priority.h"
 #include "cc/test/begin_frame_args_test.h"
@@ skipping 53 matching lines @@
       task->DidComplete();
 
       task->RunReplyOnOriginThread();
     }
     completed_tasks_.clear();
   }
 
   // Overridden from RasterizerTaskClient:
   virtual scoped_ptr<RasterBuffer> AcquireBufferForRaster(
       const Resource* resource) OVERRIDE {
-    return nullptr;
+    return scoped_ptr<RasterBuffer>();
   }
   virtual void ReleaseBufferForRaster(
       scoped_ptr<RasterBuffer> buffer) OVERRIDE {}
 
  private:
   RasterTask::Vector completed_tasks_;
 };
 base::LazyInstance<FakeRasterizerImpl> g_fake_rasterizer =
     LAZY_INSTANCE_INITIALIZER;
 
@@ skipping 27 matching lines @@
     host_impl_.tile_manager()->SetGlobalStateForTesting(state);
   }
 
   virtual void SetUp() OVERRIDE {
     picture_pile_ = FakePicturePileImpl::CreateInfiniteFilledPile();
     InitializeRenderer();
     SetTreePriority(SAME_PRIORITY_FOR_BOTH_TREES);
   }
 
   virtual void InitializeRenderer() {
-    host_impl_.InitializeRenderer(FakeOutputSurface::Create3d().Pass());
+    host_impl_.InitializeRenderer(
+        FakeOutputSurface::Create3d().PassAs<OutputSurface>());
     tile_manager()->SetRasterizerForTesting(g_fake_rasterizer.Pointer());
   }
 
   void SetupDefaultTrees(const gfx::Size& layer_bounds) {
     gfx::Size tile_size(100, 100);
 
     scoped_refptr<FakePicturePileImpl> pending_pile =
         FakePicturePileImpl::CreateFilledPile(tile_size, layer_bounds);
     scoped_refptr<FakePicturePileImpl> active_pile =
         FakePicturePileImpl::CreateFilledPile(tile_size, layer_bounds);
@@ skipping 25 matching lines @@
 
   void SetupPendingTree(scoped_refptr<PicturePileImpl> pile) {
     host_impl_.CreatePendingTree();
     LayerTreeImpl* pending_tree = host_impl_.pending_tree();
     // Clear recycled tree.
     pending_tree->DetachLayerTree();
 
     scoped_ptr<FakePictureLayerImpl> pending_layer =
         FakePictureLayerImpl::CreateWithPile(pending_tree, id_, pile);
     pending_layer->SetDrawsContent(true);
-    pending_tree->SetRootLayer(pending_layer.Pass());
+    pending_tree->SetRootLayer(pending_layer.PassAs<LayerImpl>());
 
     pending_root_layer_ = static_cast<FakePictureLayerImpl*>(
         host_impl_.pending_tree()->LayerById(id_));
     pending_root_layer_->DoPostCommitInitializationIfNeeded();
   }
 
   void CreateHighLowResAndSetAllTilesVisible() {
     // Active layer must get updated first so pending layer can share from it.
     active_root_layer_->CreateDefaultTilingsAndTiles();
     active_root_layer_->SetAllTilesVisible();
@@ skipping 175 matching lines @@
     layers.push_back(pending_root_layer_);
     int next_id = id_ + 1;
 
     // Create the rest of the layers as children of the root layer.
     while (static_cast<int>(layers.size()) < layer_count) {
       scoped_ptr<FakePictureLayerImpl> layer =
           FakePictureLayerImpl::CreateWithPile(
               host_impl_.pending_tree(), next_id, picture_pile_);
       layer->SetBounds(layer_bounds);
       layers.push_back(layer.get());
-      pending_root_layer_->AddChild(layer.Pass());
+      pending_root_layer_->AddChild(layer.PassAs<LayerImpl>());
 
       FakePictureLayerImpl* fake_layer =
           static_cast<FakePictureLayerImpl*>(layers.back());
 
       fake_layer->SetDrawsContent(true);
       fake_layer->DoPostCommitInitializationIfNeeded();
       fake_layer->CreateDefaultTilingsAndTiles();
       ++next_id;
     }
 
@@ skipping 104 matching lines @@
   RunEvictionQueueConstructAndIterateTest("10_128", 10, 128);
   RunEvictionQueueConstructAndIterateTest("50_16", 50, 16);
   RunEvictionQueueConstructAndIterateTest("50_32", 50, 32);
   RunEvictionQueueConstructAndIterateTest("50_64", 50, 64);
   RunEvictionQueueConstructAndIterateTest("50_128", 50, 128);
 }
 
 }  // namespace
 
 }  // namespace cc