[Mac][Material Design] Bring bookmark hover background up to spec.

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_constants.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.
 
 // Constants used for positioning the bookmark bar. These aren't placed in a
 // different file because they're conditionally included in cross platform code
 // and thus no Objective-C++ stuff.
 
 #ifndef CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_CONSTANTS_H_
 #define CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_CONSTANTS_H_
 
 #include <ApplicationServices/ApplicationServices.h>
 
 #include "chrome/browser/ui/bookmarks/bookmark_bar_constants.h"
 
 namespace bookmarks {
 
 // Correction used for computing other values based on the height.
 const int kVisualHeightOffset = 2;
-const int kMaterialVisualHeightOffset = 0;
+const int kMaterialVisualHeightOffset = 2;
 
 // The amount of space between the inner bookmark bar and the outer toolbar on
 // new tab pages.
 const int kNTPBookmarkBarPadding =
     (chrome::kNTPBookmarkBarHeight -
         (chrome::kBookmarkBarHeight + kVisualHeightOffset)) / 2;
-const int kMaterialNTPBookmarkBarPadding =
-    (chrome::kNTPBookmarkBarHeight -
-        (chrome::kBookmarkBarHeight + kMaterialVisualHeightOffset)) / 2;
 
 // The height of buttons in the bookmark bar.
 const int kBookmarkButtonHeight =
     chrome::kBookmarkBarHeight + kVisualHeightOffset;
-const int kMaterialBookmarkButtonHeight =
-    chrome::kBookmarkBarHeight + kMaterialVisualHeightOffset;
 
 // The height of buttons in a bookmark bar folder menu.
 const CGFloat kBookmarkFolderButtonHeight = 24.0;
 
 // The radius of the corner curves on the menu. Also used for sizing the shadow
 // window behind the menu window at times when the menu can be scrolled.
 const CGFloat kBookmarkBarMenuCornerRadius = 4.0;
 
 // Overlap (in pixels) between the toolbar and the bookmark bar (when showing in
 // normal mode).
 const CGFloat kBookmarkBarOverlap = 3.0;
 
 }  // namespace bookmarks
 
 #endif  // CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_CONSTANTS_H_