Clean LayerImpl's scroll offset callers in unit tests.

cc/trees/layer_tree_host_unittest_animation_timelines.cc

 // Copyright 2015 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/layer_tree_host.h"
 
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/animation_host.h"
 #include "cc/animation/animation_id_provider.h"
 #include "cc/animation/animation_player.h"
@@ skipping 659 matching lines @@
                                ->layer_animation_controller()
                                ->GetAnimation(TargetProperty::SCROLL_OFFSET);
 
     if (!animation || animation->run_state() != Animation::RUNNING) {
       host_impl->BlockNotifyReadyToActivateForTesting(false);
       return;
     }
 
     // Block activation until the running animation has a chance to produce a
     // scroll delta.
-    gfx::Vector2dF scroll_delta = scroll_layer_impl->ScrollDelta();
+    gfx::Vector2dF scroll_delta = ScrollDelta(scroll_layer_impl);
     if (scroll_delta.x() < 1.f || scroll_delta.y() < 1.f)
       return;
 
     host_impl->BlockNotifyReadyToActivateForTesting(false);
   }
 
   void WillActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
     if (host_impl->pending_tree()->source_frame_number() != 1)
       return;
     LayerImpl* scroll_layer_impl =
@@ skipping 753 matching lines @@
   bool called_animation_finished_;
   FakeContentLayerClient client_;
   scoped_refptr<FakePictureLayer> picture_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(
     LayerTreeHostTimelinesTestNotifyAnimationFinished);
 
 }  // namespace
 }  // namespace cc