RendererCompositorFrameSink should handle local surface id allocation

content/renderer/gpu/renderer_compositor_frame_sink.h

Index: content/renderer/gpu/renderer_compositor_frame_sink.h
diff --git a/content/renderer/gpu/renderer_compositor_frame_sink.h b/content/renderer/gpu/renderer_compositor_frame_sink.h
index d81fb36d5e9cb43282b5617c64bf11a4c24a1ee8..44fe42a3a0a67a1622a62a3433da87f842590f1a 100644
--- a/content/renderer/gpu/renderer_compositor_frame_sink.h
+++ b/content/renderer/gpu/renderer_compositor_frame_sink.h
@@ -20,6 +20,8 @@
 #include "cc/output/begin_frame_args.h"
 #include "cc/output/compositor_frame_sink.h"
 #include "cc/scheduler/begin_frame_source.h"
+#include "cc/surfaces/local_surface_id.h"
+#include "cc/surfaces/local_surface_id_allocator.h"
 #include "content/renderer/gpu/compositor_forwarding_message_filter.h"
 #include "ipc/ipc_sync_message_filter.h"
 
@@ -103,6 +105,12 @@ class RendererCompositorFrameSink
   scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue_;
   std::unique_ptr<cc::BeginFrameSource> begin_frame_source_;
   int routing_id_;
+
+  cc::LocalSurfaceId local_surface_id_;
+  cc::LocalSurfaceIdAllocator id_allocator_;
+  gfx::Size last_frame_size_;
+  float last_device_scale_factor_;
+
   base::ThreadChecker thread_checker_;
 };