Make scroll offset type of float in cc

cc/animation/layer_animation_controller.h

 // 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.
 
 #ifndef CC_ANIMATION_LAYER_ANIMATION_CONTROLLER_H_
 #define CC_ANIMATION_LAYER_ANIMATION_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
 #include "cc/animation/animation_events.h"
 #include "cc/animation/layer_animation_event_observer.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/scoped_ptr_vector.h"
+#include "ui/gfx/geometry/scroll_offset.h"
 #include "ui/gfx/transform.h"
 
 namespace gfx {
 class BoxF;
 class Transform;
 }
 
 namespace cc {
 
 class Animation;
@@ skipping 147 matching lines @@
 
   void NotifyObserversOpacityAnimated(float opacity,
                                       bool notify_active_observers,
                                       bool notify_pending_observers);
   void NotifyObserversTransformAnimated(const gfx::Transform& transform,
                                         bool notify_active_observers,
                                         bool notify_pending_observers);
   void NotifyObserversFilterAnimated(const FilterOperations& filter,
                                      bool notify_active_observers,
                                      bool notify_pending_observers);
-  void NotifyObserversScrollOffsetAnimated(const gfx::Vector2dF& scroll_offset,
-                                           bool notify_active_observers,
-                                           bool notify_pending_observers);
+  void NotifyObserversScrollOffsetAnimated(
+      const gfx::ScrollOffset& scroll_offset,
+      bool notify_active_observers,
+      bool notify_pending_observers);
 
   void NotifyObserversAnimationWaitingForDeletion();
 
   bool HasValueObserver();
   bool HasActiveValueObserver();
 
   AnimationRegistrar* registrar_;
   int id_;
   ScopedPtrVector<Animation> animations_;
 
@@ skipping 12 matching lines @@
   // Only try to start animations when new animations are added or when the
   // previous attempt at starting animations failed to start all animations.
   bool needs_to_start_animations_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerAnimationController);
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_LAYER_ANIMATION_CONTROLLER_H_