[Mac][Material Design] Add MD hover to bookmark items in menus.

chrome/browser/ui/cocoa/gradient_button_cell.h

 // Copyright (c) 2011 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 CHROME_BROWSER_UI_COCOA_GRADIENT_BUTTON_CELL_H_
 #define CHROME_BROWSER_UI_COCOA_GRADIENT_BUTTON_CELL_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
@@ skipping 96 matching lines @@
 // Actually fetches current mouse position and does a hit test.
 - (BOOL)isMouseReallyInside;
 
 // Returns the offset of the start of the text in the cell.
 - (CGFloat)textStartXOffset;
 
 // Defines the top offset of text within the cell. Used by drawTitle and can
 // be overriden by objects that inherit this class for placement of text.
 - (int)verticalTextOffset;
 
+// The amount by which the gradient button cell should nudge the path used to
+// draw the hover (and pressed) state background path.
+- (CGFloat)hoverBackgroundVerticalOffsetInControlView:(NSView*)controlView;
+
 @property(assign, nonatomic) CGFloat hoverAlpha;
 
 // An image that will be drawn after the normal content of the button cell,
 // overlaying it.  Never themed.
 @property(retain, nonatomic) NSImage* overlayImage;
 
 @end
 
 @interface GradientButtonCell(TestingAPI)
 - (BOOL)isMouseInside;
 - (BOOL)pulsing;
 - (gradient_button_cell::PulseState)pulseState;
 - (void)setPulseState:(gradient_button_cell::PulseState)pstate;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_GRADIENT_BUTTON_CELL_H_