Make scroll offset type of float in cc

cc/test/animation_test_common.cc

 // Copyright 2012 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/test/animation_test_common.h"
 
 #include "cc/animation/animation_id_provider.h"
 #include "cc/animation/keyframed_animation_curve.h"
 #include "cc/animation/layer_animation_controller.h"
 #include "cc/animation/transform_operations.h"
@@ skipping 218 matching lines @@
 }
 
 bool FakeLayerAnimationValueObserver::IsActive() const {
   return true;
 }
 
 bool FakeInactiveLayerAnimationValueObserver::IsActive() const {
   return false;
 }
 
-gfx::Vector2dF FakeLayerAnimationValueProvider::ScrollOffsetForAnimation()
+gfx::ScrollOffset FakeLayerAnimationValueProvider::ScrollOffsetForAnimation()
     const {
   return scroll_offset_;
 }
 
 scoped_ptr<AnimationCurve> FakeFloatTransition::Clone() const {
   return make_scoped_ptr(new FakeFloatTransition(*this))
       .PassAs<AnimationCurve>();
 }
 
 int AddOpacityTransitionToController(LayerAnimationController* controller,
@@ skipping 95 matching lines @@
                              double duration,
                              float start_brightness,
                              float end_brightness) {
   return AddAnimatedFilter(layer->layer_animation_controller(),
                            duration,
                            start_brightness,
                            end_brightness);
 }
 
 }  // namespace cc