Remove LayerTreeImpl::SetRootLayerFromLayerListForTesting.

cc/layers/picture_layer_unittest.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/layers/picture_layer.h"
 
 #include <stddef.h>
 
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 371 matching lines @@
 
   FakePictureLayerImpl* layer_impl = static_cast<FakePictureLayerImpl*>(
       host_impl.pending_tree()->root_layer_for_testing());
 
   layer->PushPropertiesTo(layer_impl);
 
   host->CommitComplete();
   EXPECT_EQ(2, host->source_frame_number());
 
   host_impl.ActivateSyncTree();
-  host_impl.active_tree()->SetRootLayerFromLayerListForTesting();
 
   // By updating the draw proprties on the active tree, we will set the viewport
   // rect for tile priorities to something non-empty.
   const bool can_use_lcd_text = false;
-  host_impl.active_tree()->property_trees()->needs_rebuild = true;
-  host_impl.active_tree()->BuildLayerListAndPropertyTreesForTesting();
+  host_impl.active_tree()->BuildPropertyTreesForTesting();
   host_impl.active_tree()->UpdateDrawProperties(can_use_lcd_text);
 
   layer->SetBounds(gfx::Size(11, 11));
   layer->SavePaintProperties();
 
   host_impl.CreatePendingTree();
   layer_impl = static_cast<FakePictureLayerImpl*>(
       host_impl.pending_tree()->root_layer_for_testing());
 
   // We should now have invalid contents and should therefore clear the
@@ skipping 111 matching lines @@
   // Do a main frame, record the picture layers. The frame number has changed
   // non-monotonically.
   layer->SetNeedsDisplay();
   host2->Composite(base::TimeTicks::Now());
   EXPECT_EQ(3, layer->update_count());
   EXPECT_EQ(1, host2->source_frame_number());
 }
 
 }  // namespace
 }  // namespace cc