Disable blurring for extension bubbles

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

Index: chrome/browser/ui/cocoa/extensions/extension_popup_controller.mm
diff --git a/chrome/browser/ui/cocoa/extensions/extension_popup_controller.mm b/chrome/browser/ui/cocoa/extensions/extension_popup_controller.mm
index 3e724c0048666ed435af7518174d700008c5e02e..5a2b9981f84bf95d9c786f6b9191d916f9af5ffd 100644
--- a/chrome/browser/ui/cocoa/extensions/extension_popup_controller.mm
+++ b/chrome/browser/ui/cocoa/extensions/extension_popup_controller.mm
@@ -136,6 +136,11 @@ class DevtoolsNotificationBridge : public content::NotificationObserver {
                         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