cc: consistancy of variable usage in

LayerAnimationController::AccumulatePropertyUpdates

The animation value is computed from the animation curve. The general
format used is to get the specific animation curve into one variable 
and then use the getvalue to get the actual animation value. The same
is followed across the file except in AccumulatePropertyUpdates. 
This patch takes cares of the same.

Review URL: https://codereview.chromium.org/440873002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287551 0039d316-1c4b-4281-b951-d872f2087c98

cc/animation/layer_animation_controller.cc

@@ -152,8 +152,9 @@ void LayerAnimationController::AccumulatePropertyUpdates(
                              animation->group(),
                              Animation::Opacity,
                              monotonic_time);
-        event.opacity = animation->curve()->ToFloatAnimationCurve()->GetValue(
-            trimmed);
+        const FloatAnimationCurve* float_animation_curve =
+            animation->curve()->ToFloatAnimationCurve();
+        event.opacity = float_animation_curve->GetValue(trimmed);
         event.is_impl_only = true;
         events->push_back(event);
         break;
@@ -165,8 +166,9 @@ void LayerAnimationController::AccumulatePropertyUpdates(
                              animation->group(),
                              Animation::Transform,
                              monotonic_time);
-        event.transform =
-            animation->curve()->ToTransformAnimationCurve()->GetValue(trimmed);
+        const TransformAnimationCurve* transform_animation_curve =
+            animation->curve()->ToTransformAnimationCurve();
+        event.transform = transform_animation_curve->GetValue(trimmed);
         event.is_impl_only = true;
         events->push_back(event);
         break;
@@ -178,8 +180,9 @@ void LayerAnimationController::AccumulatePropertyUpdates(
                              animation->group(),
                              Animation::Filter,
                              monotonic_time);
-        event.filters = animation->curve()->ToFilterAnimationCurve()->GetValue(
-            trimmed);
+        const FilterAnimationCurve* filter_animation_curve =
+            animation->curve()->ToFilterAnimationCurve();
+        event.filters = filter_animation_curve->GetValue(trimmed);
         event.is_impl_only = true;
         events->push_back(event);
         break;