[Mac][Material Design] Change toolbar buttons to 24x24 from 28x28.

chrome/browser/ui/cocoa/toolbar/toolbar_button_cocoa.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/toolbar/toolbar_button_cocoa.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/sdk_forward_declarations.h"
 #import "chrome/browser/ui/cocoa/image_button_cell.h"
 #import "chrome/browser/ui/cocoa/view_id_util.h"
 #include "skia/ext/skia_utils_mac.h"
 #import "ui/base/cocoa/nsview_additions.h"
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/theme_provider.h"
 #include "ui/gfx/image/image_skia_util_mac.h"
 #include "ui/gfx/paint_vector_icon.h"
 
 namespace {
 
-// The bounds of toolbar buttons in Material Design.
-const NSRect kMDButtonBounds = NSMakeRect(0, 0, 28, 28);
+// Toolbar buttons are 24x24 in Material Design.
+const NSRect kMDButtonBounds = NSMakeRect(0, 0, 24, 24);
 
 // The size of a toolbar button icon in Material Design. A toolbar button image
 // consists of a border and background, with a centered icon.
 const NSSize kMDButtonIconSize = NSMakeSize(16, 16);
 
 }  // namespace
 
 // An NSCustomImageRep subclass that creates the "three dots" image of the
 // Material Design browser tools icon.
 @interface BrowserToolsImageRep : NSCustomImageRep
@@ skipping 40 matching lines @@
 @synthesize icon = icon_;
 @synthesize style = style_;
 
 - (void)dealloc {
   [icon_ release];
   [super dealloc];
 }
 
 + (void)drawImage:(ToolbarButtonImageRep*)imageRep {
   // Create the path used for the background fill.
-  NSRect destRect = NSInsetRect(kMDButtonBounds, 2, 2);
   NSBezierPath* roundedRectPath =
-      [NSBezierPath bezierPathWithRoundedRect:destRect xRadius:2 yRadius:2];
+      [NSBezierPath bezierPathWithRoundedRect:kMDButtonBounds
+                                      xRadius:2
+                                      yRadius:2];
 
   // Determine the fill color.
   NSColor* fillColor = nil;
   switch (imageRep.style) {
     case ToolbarButtonImageBackgroundStyle::HOVER:
       fillColor = [NSColor colorWithCalibratedWhite:0 alpha:0.08];
       break;
     case ToolbarButtonImageBackgroundStyle::HOVER_THEMED:
       fillColor = [NSColor colorWithCalibratedWhite:1 alpha:0.08];
       break;
@@ skipping 256 matching lines @@
   // Update the hover and pressed image backgrounds to match the current theme.
   if (ui::MaterialDesignController::IsModeMaterial()) {
     [self resetButtonStateImages];
   }
 }
 
 - (void)windowDidChangeActive {
 }
 
 @end