cc : Use effect id to decide if surface contents scale should be applied

cc/trees/property_tree.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 <stddef.h>
 
 #include <set>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 863 matching lines @@
     } else {
       // The root surface doesn't have the notion of sub-layer scale, but
       // instead has a similar notion of transforming from the space of the root
       // layer to the space of the screen.
       DCHECK_EQ(0, destination_id);
       source_id = 1;
     }
     gfx::Transform transform;
     property_trees()->transform_tree.ComputeTransform(source_id, destination_id,
                                                       &transform);
-    if (destination_id != 0) {
+    if (effect_node->id != 1) {
       transform.matrix().postScale(effect_node->surface_contents_scale.x(),
                                    effect_node->surface_contents_scale.y(),
                                    1.f);
     }
     it->set_area(MathUtil::MapEnclosingClippedRect(transform, it->area()));
   }
 }
 
 bool EffectTree::HasCopyRequests() const {
   return !copy_requests_.empty();
@@ skipping 1003 matching lines @@
   if (transform_id > destination_transform_id) {
     return transform_tree.CombineTransformsBetween(
         transform_id, destination_transform_id, transform);
   }
 
   return transform_tree.CombineInversesBetween(
       transform_id, destination_transform_id, transform);
 }
 
 }  // namespace cc