Fix crash in GotAcceleratedIOSurfaceFrame

content/browser/renderer_host/render_widget_host_view_mac.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.
 
 #include "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <objc/runtime.h>
 #include <OpenGL/gl.h>
 #include <QuartzCore/QuartzCore.h>
 
@@ skipping 2296 matching lines @@
       // immediately.
       return true;
     }
   }
 
   // If the window occlusion API is not present then ack frames when we draw
   // them.
   return false;
 }
 
-void RenderWidgetHostViewMac::AcceleratedLayerDidDrawFrame(bool succeeded) {
+void RenderWidgetHostViewMac::AcceleratedLayerDidDrawFrame() {
   if (!render_widget_host_)
     return;
 
   SendPendingLatencyInfoToHost();
   SendPendingSwapAck();
-  if (!succeeded)
-    GotAcceleratedCompositingError();
+}
+
+void RenderWidgetHostViewMac::AcceleratedLayerHitError() {
+  if (!render_widget_host_)
+    return;
+  // Perform all acks that would have been done if the frame had succeeded, to
+  // un-block the renderer.
+  AcceleratedLayerDidDrawFrame();
+  GotAcceleratedCompositingError();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // gfx::DisplayObserver, public:
 
 void RenderWidgetHostViewMac::OnDisplayAdded(const gfx::Display& display) {
 }
 
 void RenderWidgetHostViewMac::OnDisplayRemoved(const gfx::Display& display) {
 }
@@ skipping 1702 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end