sync compositor: Add output_surface_id

content/common/android/sync_compositor_messages.h

Index: content/common/android/sync_compositor_messages.h
diff --git a/content/common/android/sync_compositor_messages.h b/content/common/android/sync_compositor_messages.h
index 0ad1cf1a2e70f8719747099fdab32a89fadb671c..6bc0298fab6acf40e6c64897117372ce2baf971b 100644
--- a/content/common/android/sync_compositor_messages.h
+++ b/content/common/android/sync_compositor_messages.h
@@ -26,6 +26,7 @@ struct SyncCompositorCommonBrowserParams {
   ~SyncCompositorCommonBrowserParams();
 
   uint32_t bytes_limit;
+  uint32_t output_surface_id;
   cc::CompositorFrameAck ack;
   gfx::ScrollOffset root_scroll_offset;
   bool update_root_scroll_offset;
@@ -96,6 +97,7 @@ struct SyncCompositorCommonRendererParams {
 
 IPC_STRUCT_TRAITS_BEGIN(content::SyncCompositorCommonBrowserParams)
   IPC_STRUCT_TRAITS_MEMBER(bytes_limit)
+  IPC_STRUCT_TRAITS_MEMBER(output_surface_id)
   IPC_STRUCT_TRAITS_MEMBER(ack)
   IPC_STRUCT_TRAITS_MEMBER(root_scroll_offset)
   IPC_STRUCT_TRAITS_MEMBER(update_root_scroll_offset)
@@ -153,10 +155,11 @@ IPC_MESSAGE_ROUTED2(SyncCompositorMsg_ComputeScroll,
                     content::SyncCompositorCommonBrowserParams,
                     base::TimeTicks);
 
-IPC_SYNC_MESSAGE_ROUTED2_2(SyncCompositorMsg_DemandDrawHw,
+IPC_SYNC_MESSAGE_ROUTED2_3(SyncCompositorMsg_DemandDrawHw,
                            content::SyncCompositorCommonBrowserParams,
                            content::SyncCompositorDemandDrawHwParams,
                            content::SyncCompositorCommonRendererParams,
+                           uint32_t /* output_surface_id */,

[hush (inactive), 2016/03/08 23:55:49]

where is the renderer change that writes output surface id to the reply message?

[hush (inactive), 2016/03/08 23:56:56]

nevermind that. Just saw it.

                            cc::CompositorFrame)
 
 IPC_SYNC_MESSAGE_ROUTED2_2(SyncCompositorMsg_SetSharedMemory,