gfx: Make conversions from Size to SizeF be explicit.

ui/views/animation/test/ink_drop_animation_test_api.h

 // 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.
 
 #ifndef UI_VIEWS_ANIMATION_TEST_INK_DROP_ANIMATION_TEST_API_H_
 #define UI_VIEWS_ANIMATION_TEST_INK_DROP_ANIMATION_TEST_API_H_
 
-#include "ui/gfx/geometry/size_f.h"
+#include "ui/gfx/geometry/size.h"
 
 namespace views {
 class InkDropAnimation;
 
 namespace test {
 
 // Test API to provide internal access to an InkDropAnimation.
 class InkDropAnimationTestApi {
  public:
   typedef InkDropAnimation::InkDropTransforms InkDropTransforms;
   typedef InkDropAnimation::PaintedShape PaintedShape;
 
   explicit InkDropAnimationTestApi(InkDropAnimation* ink_drop_animation);
   ~InkDropAnimationTestApi();
 
   // Wrapper functions the wrapped InkDropedAnimation:
-  void CalculateCircleTransforms(const gfx::SizeF size,
+  void CalculateCircleTransforms(const gfx::Size& size,
                                  InkDropTransforms* transforms_out) const;
-  void CalculateRectTransforms(const gfx::SizeF size,
+  void CalculateRectTransforms(const gfx::Size& size,
                                float corner_radius,
                                InkDropTransforms* transforms_out) const;
 
  private:
   // The InkDropAnimation to provide internal access to.
   InkDropAnimation* ink_drop_animation_;
 
   DISALLOW_COPY_AND_ASSIGN(InkDropAnimationTestApi);
 };
 
 }  // namespace test
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_TEST_INK_DROP_ANIMATION_TEST_API_H_