WIP Handle AwContents needing multiple live functors.

android_webview/browser/compositor_frame_producer.h

 // Copyright 2016 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.
 
 #ifndef ANDROID_WEBVIEW_BROWSER_COMPOSITOR_FRAME_PRODUCER_H_
 #define ANDROID_WEBVIEW_BROWSER_COMPOSITOR_FRAME_PRODUCER_H_
 
 namespace android_webview {
 
 class CompositorFrameConsumer;
 
 class CompositorFrameProducer {
  public:
-  virtual void OnParentDrawConstraintsUpdated() = 0;
-  virtual void OnCompositorFrameConsumerWillDestroy() = 0;
+  virtual void OnParentDrawConstraintsUpdated(
+      CompositorFrameConsumer* compositor_frame_consumer) = 0;
+  virtual void RemoveCompositorFrameConsumer(
+      CompositorFrameConsumer* compositor_frame_consumer) = 0;
 
  protected:
   virtual ~CompositorFrameProducer() {}
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_COMPOSITOR_FRAME_PRODUCER_H_