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

cc/trees/occlusion_tracker_perftest.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/trees/occlusion_tracker.h"
 
 #include "base/time/time.h"
 #include "cc/debug/lap_timer.h"
 #include "cc/layers/layer_iterator.h"
 #include "cc/layers/solid_color_layer_impl.h"
@@ skipping 20 matching lines @@
   OcclusionTrackerPerfTest()
       : timer_(kWarmupRuns,
                base::TimeDelta::FromMilliseconds(kTimeLimitMillis),
                kTimeCheckInterval),
         impl_(&proxy_) {}
   void CreateHost() {
     LayerTreeSettings settings;
     shared_bitmap_manager_.reset(new TestSharedBitmapManager());
     host_impl_ = LayerTreeHostImpl::Create(
         settings, &client_, &proxy_, &stats_, shared_bitmap_manager_.get(), 1);
-    host_impl_->InitializeRenderer(FakeOutputSurface::Create3d());
+    host_impl_->InitializeRenderer(
+        FakeOutputSurface::Create3d().PassAs<OutputSurface>());
 
     scoped_ptr<LayerImpl> root_layer = LayerImpl::Create(active_tree(), 1);
     active_tree()->SetRootLayer(root_layer.Pass());
   }
 
   LayerTreeImpl* active_tree() { return host_impl_->active_tree(); }
 
   void SetTestName(const std::string& name) { test_name_ = name; }
 
   void PrintResults() {
@@ skipping 26 matching lines @@
   CreateHost();
   host_impl_->SetViewportSize(viewport_rect.size());
 
   scoped_ptr<SolidColorLayerImpl> opaque_layer =
       SolidColorLayerImpl::Create(active_tree(), 2);
   opaque_layer->SetBackgroundColor(SK_ColorRED);
   opaque_layer->SetContentsOpaque(true);
   opaque_layer->SetDrawsContent(true);
   opaque_layer->SetBounds(viewport_rect.size());
   opaque_layer->SetContentBounds(viewport_rect.size());
-  active_tree()->root_layer()->AddChild(opaque_layer.Pass());
+  active_tree()->root_layer()->AddChild(opaque_layer.PassAs<LayerImpl>());
 
   active_tree()->UpdateDrawProperties();
   const LayerImplList& rsll = active_tree()->RenderSurfaceLayerList();
   ASSERT_EQ(1u, rsll.size());
   EXPECT_EQ(1u, rsll[0]->render_surface()->layer_list().size());
 
   LayerIterator<LayerImpl> begin = LayerIterator<LayerImpl>::Begin(&rsll);
   LayerIterator<LayerImpl> end = LayerIterator<LayerImpl>::End(&rsll);
 
   LayerIteratorPosition<LayerImpl> pos = begin;
@@ skipping 49 matching lines @@
     scoped_ptr<SolidColorLayerImpl> opaque_layer =
         SolidColorLayerImpl::Create(active_tree(), 2 + i);
     opaque_layer->SetBackgroundColor(SK_ColorRED);
     opaque_layer->SetContentsOpaque(true);
     opaque_layer->SetDrawsContent(true);
     opaque_layer->SetBounds(
         gfx::Size(viewport_rect.width() / 2, viewport_rect.height() / 2));
     opaque_layer->SetContentBounds(
         gfx::Size(viewport_rect.width() / 2, viewport_rect.height() / 2));
     opaque_layer->SetPosition(gfx::Point(i, i));
-    active_tree()->root_layer()->AddChild(opaque_layer.Pass());
+    active_tree()->root_layer()->AddChild(opaque_layer.PassAs<LayerImpl>());
   }
 
   active_tree()->UpdateDrawProperties();
   const LayerImplList& rsll = active_tree()->RenderSurfaceLayerList();
   ASSERT_EQ(1u, rsll.size());
   EXPECT_EQ(static_cast<size_t>(kNumOpaqueLayers),
             rsll[0]->render_surface()->layer_list().size());
 
   LayerIterator<LayerImpl> begin = LayerIterator<LayerImpl>::Begin(&rsll);
   LayerIterator<LayerImpl> end = LayerIterator<LayerImpl>::End(&rsll);
@@ skipping 31 matching lines @@
   EXPECT_EQ(active_tree()->root_layer(), next.current_layer);
 
   ++begin;
   EXPECT_EQ(end, begin);
 
   PrintResults();
 }
 
 }  // namespace
 }  // namespace cc