gfx: Make conversions from Size to SizeF be explicit.

ui/views/animation/ink_drop_animation.cc

Index: ui/views/animation/ink_drop_animation.cc
diff --git a/ui/views/animation/ink_drop_animation.cc b/ui/views/animation/ink_drop_animation.cc
index 39c349459e9fc41299e04325e40013ba94b3b043..d5ce3ca9d524b6984d00343092ef49a3c44e566c 100644
--- a/ui/views/animation/ink_drop_animation.cc
+++ b/ui/views/animation/ink_drop_animation.cc
@@ -370,14 +370,14 @@ void InkDropAnimation::SetOpacity(float opacity) {
 }
 
 void InkDropAnimation::CalculateCircleTransforms(
-    const gfx::SizeF& size,
+    const gfx::Size& size,
     InkDropTransforms* transforms_out) const {
   CalculateRectTransforms(size, std::min(size.width(), size.height()) / 2.0f,
                           transforms_out);
 }
 
 void InkDropAnimation::CalculateRectTransforms(
-    const gfx::SizeF& size,
+    const gfx::Size& size,
     float corner_radius,
     InkDropTransforms* transforms_out) const {
   DCHECK_GE(size.width() / 2.0f, corner_radius)