cc: Merge LayerTree into the LayerTreeHost.

cc/test/layer_tree_pixel_test.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 "cc/test/layer_tree_pixel_test.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/command_line.h"
@@ skipping 84 matching lines @@
 
 void LayerTreePixelTest::ReadbackResult(
     std::unique_ptr<CopyOutputResult> result) {
   ASSERT_TRUE(result->HasBitmap());
   result_bitmap_ = result->TakeBitmap();
   EndTest();
 }
 
 void LayerTreePixelTest::BeginTest() {
   Layer* target =
-      readback_target_ ? readback_target_ : layer_tree()->root_layer();
+      readback_target_ ? readback_target_ : layer_tree_host()->root_layer();
   target->RequestCopyOfOutput(CreateCopyOutputRequest());
   PostSetNeedsCommitToMainThread();
 }
 
 void LayerTreePixelTest::AfterTest() {
   base::FilePath test_data_dir;
   EXPECT_TRUE(PathService::Get(CCPaths::DIR_TEST_DATA, &test_data_dir));
   base::FilePath ref_file_path = test_data_dir.Append(ref_file_);
 
   base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
@@ skipping 92 matching lines @@
   content_root_ = content_root;
   readback_target_ = target;
   ref_file_ = file_name;
   RunTest(CompositorMode::THREADED);
 }
 
 void LayerTreePixelTest::SetupTree() {
   scoped_refptr<Layer> root = Layer::Create();
   root->SetBounds(content_root_->bounds());
   root->AddChild(content_root_);
-  layer_tree()->SetRootLayer(root);
+  layer_tree_host()->SetRootLayer(root);
   LayerTreeTest::SetupTree();
 }
 
 std::unique_ptr<SkBitmap> LayerTreePixelTest::CopyTextureMailboxToBitmap(
     const gfx::Size& size,
     const TextureMailbox& texture_mailbox) {
   DCHECK(texture_mailbox.IsTexture());
   if (!texture_mailbox.IsTexture())
     return nullptr;
 
@@ skipping 57 matching lines @@
 }
 
 void LayerTreePixelTest::Finish() {
   std::unique_ptr<gpu::GLInProcessContext> context =
       CreateTestInProcessContext();
   GLES2Interface* gl = context->GetImplementation();
   gl->Finish();
 }
 
 }  // namespace cc