Permissions/Mac: Fix missing right padding for Cocoa permission prompt bubbles.

chrome/browser/ui/cocoa/permission_bubble/permission_bubble_controller.mm

 // Copyright 2014 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/permission_bubble/permission_bubble_controller.h"
 
 #include <algorithm>
 
 #include "base/mac/bind_objc_block.h"
 #include "base/macros.h"
@@ skipping 391 matching lines @@
       maxMenuWidth = std::max(maxMenuWidth, [button maximumTitleWidth]);
     }
     maxPermissionLineWidth += maxMenuWidth;
   }
 
   // The title and 'x' button row must fit within the bubble.
   CGFloat titleRowWidth = NSMaxX([titleView frame]) +
                           NSWidth([closeButton frame]) +
                           chrome_style::kCloseButtonPadding;
 
-  bubbleFrame.size.width = std::max(
-      NSWidth(bubbleFrame), std::max(titleRowWidth, maxPermissionLineWidth));
+  bubbleFrame.size.width =
+      std::max(NSWidth(bubbleFrame),
+               std::max(titleRowWidth, maxPermissionLineWidth)) +
+      kHorizontalPadding;
 
   // Now that the bubble's dimensions have been set, lay out the buttons and
   // menus.
 
   // Place the close button at the upper-right-hand corner of the bubble.
   NSPoint closeButtonOrigin =
       NSMakePoint(NSWidth(bubbleFrame) - NSWidth([closeButton frame]) -
                       chrome_style::kCloseButtonPadding,
                   NSHeight(bubbleFrame) - NSWidth([closeButton frame]) -
                       chrome_style::kCloseButtonPadding);
@@ skipping 234 matching lines @@
 }
 
 - (IBAction)cancel:(id)sender {
   // This is triggered by ESC when the bubble has focus.
   if (delegate_)
     delegate_->Closing();
   [super cancel:sender];
 }
 
 @end  // implementation PermissionBubbleController