cc: Compute animation scale on demand

cc/test/layer_tree_host_common_test.h

 // 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.
 
 #ifndef CC_TEST_LAYER_TREE_HOST_COMMON_TEST_H_
 #define CC_TEST_LAYER_TREE_HOST_COMMON_TEST_H_
 
 #include <algorithm>
 #include <memory>
 #include <vector>
@@ skipping 124 matching lines @@
  protected:
   static void SetScrollOffsetDelta(LayerImpl* layer_impl,
                                    const gfx::Vector2dF& delta) {
     if (layer_impl->layer_tree_impl()
             ->property_trees()
             ->scroll_tree.SetScrollOffsetDeltaForTesting(layer_impl->id(),
                                                          delta))
       layer_impl->layer_tree_impl()->DidUpdateScrollOffset(
           layer_impl->id(), layer_impl->transform_tree_index());
   }
+
+  static float GetMaximumAnimationScale(LayerImpl* layer_impl) {
+    return layer_impl->layer_tree_impl()
+        ->property_trees()
+        ->GetAnimationScales(layer_impl->transform_tree_index(),
+                             layer_impl->layer_tree_impl())
+        .maximum_animation_scale;
+  }
+
+  static float GetStartingAnimationScale(LayerImpl* layer_impl) {
+    return layer_impl->layer_tree_impl()
+        ->property_trees()
+        ->GetAnimationScales(layer_impl->transform_tree_index(),
+                             layer_impl->layer_tree_impl())
+        .starting_animation_scale;
+  }
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_LAYER_TREE_HOST_COMMON_TEST_H_