cc: Dedup IPCs to return resources to client

content/browser/renderer_host/delegated_frame_host.h

Index: content/browser/renderer_host/delegated_frame_host.h
diff --git a/content/browser/renderer_host/delegated_frame_host.h b/content/browser/renderer_host/delegated_frame_host.h
index 288060dcf4283922b01b9edd630b3654284bdecb..712c7ed54a5046bca8f73b7ee65b61db0a6d0fad 100644
--- a/content/browser/renderer_host/delegated_frame_host.h
+++ b/content/browser/renderer_host/delegated_frame_host.h
@@ -69,12 +69,10 @@ class CONTENT_EXPORT DelegatedFrameHostClient {
       bool defer_compositor_lock) = 0;
   virtual void DelegatedFrameHostResizeLockWasReleased() = 0;
 
-  virtual void DelegatedFrameHostSendCompositorSwapAck(
-      int output_surface_id,
-      const cc::CompositorFrameAck& ack) = 0;
   virtual void DelegatedFrameHostSendReclaimCompositorResources(
       int output_surface_id,
-      const cc::CompositorFrameAck& ack) = 0;
+      bool is_swap_ack,
+      const cc::ReturnedResourceArray& resources) = 0;
   virtual void DelegatedFrameHostOnLostCompositorResources() = 0;
 
   virtual void DelegatedFrameHostUpdateVSyncParameters(
@@ -239,9 +237,9 @@ class CONTENT_EXPORT DelegatedFrameHost
       scoped_refptr<OwnedMailbox> subscriber_texture,
       const gpu::SyncToken& sync_token);
 
-  void SendDelegatedFrameAck(uint32_t output_surface_id);
+  void SendReclaimCompositorResources(uint32_t output_surface_id,
+                                      bool is_swap_ack);
   void SurfaceDrawn(uint32_t output_surface_id, cc::SurfaceDrawStatus drawn);
-  void SendReturnedDelegatedResources(uint32_t output_surface_id);
 
   // Called to consult the current |frame_subscriber_|, to determine and maybe
   // initiate a copy-into-video-frame request.