Fix crash in GotAcceleratedIOSurfaceFrame

content/browser/compositor/browser_compositor_view_private_mac.h

Index: content/browser/compositor/browser_compositor_view_private_mac.h
diff --git a/content/browser/compositor/browser_compositor_view_private_mac.h b/content/browser/compositor/browser_compositor_view_private_mac.h
index e84fc9c001b1d9917fbd90a045566626d05297bf..e36142ac637892bb02b62a0589bca2151b453b1b 100644
--- a/content/browser/compositor/browser_compositor_view_private_mac.h
+++ b/content/browser/compositor/browser_compositor_view_private_mac.h
@@ -49,7 +49,8 @@ class BrowserCompositorViewMacInternal
 private:
   // CompositingIOSurfaceLayerClient implementation:
   virtual bool AcceleratedLayerShouldAckImmediately() const OVERRIDE;
-  virtual void AcceleratedLayerDidDrawFrame(bool succeeded) OVERRIDE;
+  virtual void AcceleratedLayerDidDrawFrame() OVERRIDE;
+  virtual void AcceleratedLayerHitError() OVERRIDE;
 
   void GotAcceleratedCAContextFrame(
       CAContextID ca_context_id, gfx::Size pixel_size, float scale_factor);
@@ -57,6 +58,16 @@ private:
   void GotAcceleratedIOSurfaceFrame(
       IOSurfaceID io_surface_id, gfx::Size pixel_size, float scale_factor);
 
+  // Remove a layer from the heirarchy and destroy it. Because the accelerated
+  // layer types may be replaced by a layer of the same type, the layer to
+  // destroy is parameterized, and, if it is the current layer, the current
+  // layer is reset.
+  void DestroyCAContextLayer(
+      base::scoped_nsobject<CALayerHost> ca_context_layer);
+  void DestroyIOSurfaceLayer(
+      base::scoped_nsobject<CompositingIOSurfaceLayer> io_surface_layer);
+  void DestroySoftwareLayer();
+
   // The client of the BrowserCompositorViewMac that is using this as its
   // internals.
   BrowserCompositorViewMacClient* client_;