Fix MD button hover shadow effect on odd-sized buttons.

ui/views/animation/ink_drop_highlight.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_INK_DROP_HIGHLIGHT_H_
 #define UI_VIEWS_ANIMATION_INK_DROP_HIGHLIGHT_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 24 matching lines @@
 class InkDropHighlightObserver;
 
 // Manages fade in/out animations for a painted Layer that is used to provide
 // visual feedback on ui::Views for highlight states (e.g. mouse hover, keyboard
 // focus).
 class VIEWS_EXPORT InkDropHighlight {
  public:
   enum AnimationType { FADE_IN, FADE_OUT };
 
   // Creates a highlight with a specified painter.
-  InkDropHighlight(const gfx::Point& center_point,
+  InkDropHighlight(const gfx::PointF& center_point,
                    std::unique_ptr<BasePaintedLayerDelegate> layer_delegate);
 
   // Creates a highlight that paints a partially transparent roundrect with
   // color |color|.
   InkDropHighlight(const gfx::Size& size,
                    int corner_radius,
-                   const gfx::Point& center_point,
+                   const gfx::PointF& center_point,
                    SkColor color);
   virtual ~InkDropHighlight();
 
   void set_observer(InkDropHighlightObserver* observer) {
     observer_ = observer;
   }
 
   void set_explode_size(const gfx::Size& size) { explode_size_ = size; }
 
   // Returns true if the highlight animation is either in the process of fading
@@ skipping 42 matching lines @@
 
   // The size of the highlight shape when fully faded in.
   gfx::Size size_;
 
   // The target size of the highlight shape when it expands during a fade out
   // animation.
   gfx::Size explode_size_;
 
   // The center point of the highlight shape in the parent Layer's coordinate
   // space.
   gfx::PointF center_point_;

[sky, 2016/06/28 02:46:25]

I'm surprised we stored a float but didn't take a float. Interesting.

 
   // The opacity for the fully visible state of the highlight.
   float visible_opacity_;
 
   // True if the last animation to be initiated was a FADE_IN, and false
   // otherwise.
   bool last_animation_initiated_was_fade_in_;
 
   // The LayerDelegate that paints the highlight |layer_|.
   std::unique_ptr<BasePaintedLayerDelegate> layer_delegate_;
@@ skipping 12 matching lines @@
 
 // This is declared here for use in gtest-based unit tests but is defined in
 // the views_test_support target. Depend on that to use this in your unit test.
 // This should not be used in production code - call ToString() instead.
 void PrintTo(InkDropHighlight::AnimationType animation_type,
              ::std::ostream* os);
 
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_INK_DROP_HIGHLIGHT_H_