Index: content/common/gpu/gpu_messages.h |
diff --git a/content/common/gpu/gpu_messages.h b/content/common/gpu/gpu_messages.h |
index 2b3a732115713d2bed9943ff048c7997a39a4c8b..16ca26253bc0ba14b032b7ffe1b7267af34b6124 100644 |
--- a/content/common/gpu/gpu_messages.h |
+++ b/content/common/gpu/gpu_messages.h |
@@ -110,6 +110,9 @@ IPC_STRUCT_BEGIN(AcceleratedSurfaceMsg_BufferPresented_Params) |
// If the browser is drawing to the screen, this is the CGL renderer ID of |
// the GL context that the brower is using. |
IPC_STRUCT_MEMBER(int32, renderer_id) |
+ // The CGDirectDisplayID on which the content was displayed, to be used for |
+ // computing vsync. If vsync is not enabled, this is zero. |
+ IPC_STRUCT_MEMBER(uint32, display_id_for_vsync) |
IPC_STRUCT_END() |
#endif |