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

cc/trees/damage_tracker_unittest.cc

 // Copyright 2011 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/damage_tracker.h"
 
 #include "cc/base/math_util.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
@@ skipping 23 matching lines @@
   ASSERT_TRUE(root->render_surface());
   ASSERT_FALSE(render_surface_layer_list.size());
 
   LayerTreeHostCommon::CalculateDrawProperties(root,
                                                root->bounds(),
                                                1.f,
                                                1.f,
                                                NULL,
                                                dummy_max_texture_size,
                                                false,
-                                               &render_surface_layer_list,
-                                               false);
+                                               &render_surface_layer_list);
 }
 
 void ClearDamageForAllSurfaces(LayerImpl* layer) {
   if (layer->render_surface())
     layer->render_surface()->damage_tracker()->DidDrawDamagedArea();
 
   // Recursively clear damage for any existing surface.
   for (size_t i = 0; i < layer->children().size(); ++i)
     ClearDamageForAllSurfaces(layer->children()[i]);
 }
@@ skipping 1295 matching lines @@
   // Damage should remain empty even after one frame, since there's yet no new
   // damage.
   EmulateDrawingOneFrame(root.get());
   root_damage_rect =
           root->render_surface()->damage_tracker()->current_damage_rect();
   EXPECT_TRUE(root_damage_rect.IsEmpty());
 }
 
 }  // namespace
 }  // namespace cc