Fix crash in GotAcceleratedIOSurfaceFrame

content/browser/renderer_host/compositing_iosurface_layer_mac.h

Index: content/browser/renderer_host/compositing_iosurface_layer_mac.h
diff --git a/content/browser/renderer_host/compositing_iosurface_layer_mac.h b/content/browser/renderer_host/compositing_iosurface_layer_mac.h
index b9d19da0ef4b860b9e849cc3ff7b9266a4743bb6..a01b6fc125ce6fa609b61c09ce6a7a8337a5e0bc 100644
--- a/content/browser/renderer_host/compositing_iosurface_layer_mac.h
+++ b/content/browser/renderer_host/compositing_iosurface_layer_mac.h
@@ -22,8 +22,17 @@ class CompositingIOSurfaceContext;
 // BrowserCompositorViewMac).
 class CompositingIOSurfaceLayerClient {
  public:
+  // Used to indicate that the layer should attempt to draw immediately and
+  // should (even if the draw is elided by the system), ack the frame
+  // immediately.
   virtual bool AcceleratedLayerShouldAckImmediately() const = 0;
-  virtual void AcceleratedLayerDidDrawFrame(bool succeeded) = 0;
+
+  // Called when a frame is drawn or when, because the layer is not visible, it
+  // is known that the frame will never drawn.
+  virtual void AcceleratedLayerDidDrawFrame() = 0;
+
+  // Called when an error prevents the frame from being drawn.
+  virtual void AcceleratedLayerHitError() = 0;
 };
 
 // CompositingIOSurfaceLayerHelper provides C++ functionality needed for the