Rewire Android WebView's compositor changed signal.

android_webview/browser/compositor_frame_consumer.h

Index: android_webview/browser/compositor_frame_consumer.h
diff --git a/android_webview/browser/compositor_frame_consumer.h b/android_webview/browser/compositor_frame_consumer.h
index 311186800268823d730557baa29c73212750f488..8d86bb489293faae34e7a6e72e8604de35c3046b 100644
--- a/android_webview/browser/compositor_frame_consumer.h
+++ b/android_webview/browser/compositor_frame_consumer.h
@@ -7,6 +7,7 @@
 
 #include <map>
 
+#include "android_webview/browser/compositor_id.h"
 #include "android_webview/browser/parent_compositor_draw_constraints.h"
 #include "cc/resources/returned_resource.h"
 #include "ui/gfx/geometry/vector2d.h"
@@ -15,6 +16,7 @@ namespace android_webview {
 
 class ChildFrame;
 class CompositorFrameProducer;
+struct CompositorID;
 
 class CompositorFrameConsumer {
  public:
@@ -25,7 +27,7 @@ class CompositorFrameConsumer {
     uint32_t output_surface_id;
     cc::ReturnedResourceArray resources;
   };
-  using ReturnedResourcesMap = std::map<uint32_t, ReturnedResources>;
+  using ReturnedResourcesMap = std::map<CompositorID, ReturnedResources>;
 
   // A CompositorFrameConsumer may be registered with at most one
   // CompositorFrameProducer.