Update from https://crrev.com/306901

cc/trees/layer_tree_impl_unittest.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/layer_tree_impl.h"
 
 #include "cc/layers/heads_up_display_layer_impl.h"
 #include "cc/layers/layer.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
@@ skipping 1777 matching lines @@
     root->AddChild(test_layer.Pass());
   }
 
   float device_scale_factor = 3.f;
   float page_scale_factor = 5.f;
   gfx::Size scaled_bounds_for_root = gfx::ToCeiledSize(
       gfx::ScaleSize(root->bounds(), device_scale_factor * page_scale_factor));
   host_impl().SetViewportSize(scaled_bounds_for_root);
 
   host_impl().SetDeviceScaleFactor(device_scale_factor);
-  host_impl().active_tree()->SetPageScaleFactorAndLimits(
+  host_impl().active_tree()->PushPageScaleFromMainThread(
       page_scale_factor, page_scale_factor, page_scale_factor);
+  host_impl().SetPageScaleOnActiveTree(page_scale_factor);
   host_impl().active_tree()->SetRootLayer(root.Pass());
   host_impl().active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 1, 1,
                                                       Layer::INVALID_ID);
   host_impl().UpdateNumChildrenAndDrawPropertiesForActiveTree();
 
   // Sanity check the scenario we just created.
   // The visible content rect for test_layer is actually 100x100, even though
   // its layout size is 50x50, positioned at 25x25.
   LayerImpl* test_layer =
       host_impl().active_tree()->root_layer()->children()[0];
@@ skipping 482 matching lines @@
     root->AddChild(sub_layer.Pass());
   }
 
   float device_scale_factor = 3.f;
   float page_scale_factor = 5.f;
   gfx::Size scaled_bounds_for_root = gfx::ToCeiledSize(
       gfx::ScaleSize(root->bounds(), device_scale_factor * page_scale_factor));
   host_impl().SetViewportSize(scaled_bounds_for_root);
 
   host_impl().SetDeviceScaleFactor(device_scale_factor);
-  host_impl().active_tree()->SetPageScaleFactorAndLimits(
+  host_impl().active_tree()->PushPageScaleFromMainThread(
       page_scale_factor, page_scale_factor, page_scale_factor);
+  host_impl().SetPageScaleOnActiveTree(page_scale_factor);
   host_impl().active_tree()->SetRootLayer(root.Pass());
   host_impl().active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 1, 1,
                                                       Layer::INVALID_ID);
   host_impl().UpdateNumChildrenAndDrawPropertiesForActiveTree();
 
   // Sanity check the scenario we just created.
   ASSERT_EQ(1u, RenderSurfaceLayerList().size());
 
   LayerSelectionBound left_input;
   left_input.type = SELECTION_BOUND_LEFT;
@@ skipping 44 matching lines @@
   EXPECT_EQ(0u, host_impl().active_tree()->NumLayers());
   scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl().active_tree(), 1);
   root->AddChild(LayerImpl::Create(host_impl().active_tree(), 2));
   root->AddChild(LayerImpl::Create(host_impl().active_tree(), 3));
   root->child_at(1)->AddChild(LayerImpl::Create(host_impl().active_tree(), 4));
   EXPECT_EQ(4u, host_impl().active_tree()->NumLayers());
 }
 
 }  // namespace
 }  // namespace cc