Merge 144723 - [Mac] Do not show the fullscreen exit bubble while transitioning. Wait until the tra…

chrome/browser/ui/cocoa/browser_window_controller_private.mm

Index: chrome/browser/ui/cocoa/browser_window_controller_private.mm
===================================================================
--- chrome/browser/ui/cocoa/browser_window_controller_private.mm	(revision 145793)
+++ chrome/browser/ui/cocoa/browser_window_controller_private.mm	(working copy)
@@ -793,6 +793,14 @@
 }
 
 - (void)showFullscreenExitBubbleIfNecessary {
+  // This method is called in response to
+  // |-updateFullscreenExitBubbleURL:bubbleType:|. If on Lion the system is
+  // transitioning, do not show the bubble because it will cause visual jank
+  // <http://crbug.com/130649>. This will be called again as part of
+  // |-windowDidEnterFullScreen:|, so arrange to do that work then instead.
+  if (enteringFullscreen_)
+    return;
+
   [presentationModeController_ ensureOverlayHiddenWithAnimation:NO delay:NO];
 
   if (fullscreenBubbleType_ == FEB_TYPE_NONE ||