Disable blurring for extension bubbles

chrome/browser/ui/cocoa/extensions/extension_popup_controller.mm

 // Copyright (c) 2012 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/extensions/extension_popup_controller.h"
 
 #include <algorithm>
 
 #include "chrome/browser/debugger/devtools_window.h"
 #include "chrome/browser/extensions/extension_host.h"
@@ skipping 118 matching lines @@
      arrowLocation:(info_bubble::BubbleArrowLocation)arrowLocation
            devMode:(BOOL)devMode {
   scoped_nsobject<InfoBubbleWindow> window(
       [[InfoBubbleWindow alloc]
           initWithContentRect:ui::kWindowSizeDeterminedLater
                     styleMask:NSBorderlessWindowMask
                       backing:NSBackingStoreBuffered
                         defer:YES]);
   if (!window.get())
     return nil;
+
+  // Don't blur the extension window background. This can interfer with OpenGL
+  // drawing on the window. See http://openradar.appspot.com/11920246
+  [window setHasBlurredBackground:NO];
+
   anchoredAt = [parentWindow convertBaseToScreen:anchoredAt];
   if ((self = [super initWithWindow:window
                        parentWindow:parentWindow
                          anchoredAt:anchoredAt])) {
     host_.reset(host);
     beingInspected_ = devMode;
 
     InfoBubbleView* view = self.bubble;
     [view setArrowLocation:arrowLocation];
 
@@ skipping 220 matching lines @@
   return minSize;
 }
 
 // Private (TestingAPI)
 + (NSSize)maxPopupSize {
   NSSize maxSize = {ExtensionViewMac::kMaxWidth, ExtensionViewMac::kMaxHeight};
   return maxSize;
 }
 
 @end