cc: Simplify the logic for deciding to update tile priorities.

cc/layers/layer_position_constraint_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/layer_position_constraint.h"
 
 #include <vector>
 
 #include "cc/layers/layer_impl.h"
 #include "cc/test/fake_impl_proxy.h"
@@ skipping 29 matching lines @@
   gfx::Transform identity_matrix;
   std::vector<LayerImpl*> dummy_render_surface_layer_list;
   int dummy_max_texture_size = 512;
   gfx::Size device_viewport_size =
       gfx::Size(root_layer->bounds().width() * device_scale_factor,
                 root_layer->bounds().height() * device_scale_factor);
 
   // We are probably not testing what is intended if the root_layer bounds are
   // empty.
   DCHECK(!root_layer->bounds().IsEmpty());
-  LayerTreeHostCommon::CalculateDrawProperties(root_layer,
-                                               device_viewport_size,
-                                               device_scale_factor,
-                                               page_scale_factor,
-                                               page_scale_application_layer,
-                                               dummy_max_texture_size,
-                                               can_use_lcd_text,
-                                               &dummy_render_surface_layer_list,
-                                               false);
+  LayerTreeHostCommon::CalculateDrawProperties(
+      root_layer,
+      device_viewport_size,
+      device_scale_factor,
+      page_scale_factor,
+      page_scale_application_layer,
+      dummy_max_texture_size,
+      can_use_lcd_text,
+      &dummy_render_surface_layer_list);
 }
 
 void ExecuteCalculateDrawProperties(LayerImpl* root_layer) {
   LayerImpl* page_scale_application_layer = NULL;
   ExecuteCalculateDrawProperties(
       root_layer, 1.f, 1.f, page_scale_application_layer, false);
 }
 
 class LayerPositionConstraintTest : public testing::Test {
  public:
@@ skipping 1020 matching lines @@
   ExecuteCalculateDrawProperties(root_.get());
 
   // Root layer is not the fixed-container anyway.
   EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix, child->draw_transform());
   EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform,
                                   grand_child->draw_transform());
 }
 
 }  // namespace
 }  // namespace cc