Replace usage of SurfaceId's client_id with FrameSinkId

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index 5610ff703430ad2fd8e0630e05e8b64c01de46c8..3a4454746a31c5483251e0903de794e29fccdbfa 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -20,6 +20,7 @@ class Rect;
 }  // namespace gfx
 
 namespace cc {
+class FrameSinkId;
 class InputHandler;
 class LayerTree;
 class LayerTreeDebugState;
@@ -65,7 +66,7 @@ class CC_EXPORT LayerTreeHost {
 
   // Sets the client id used to generate the SurfaceId that uniquely identifies
   // the Surfaces produced by this compositor.
-  virtual void SetSurfaceClientId(uint32_t client_id) = 0;
+  virtual void SetFrameSinkId(const FrameSinkId& frame_sink_id) = 0;
 
   // Sets the LayerTreeMutator interface used to directly mutate the compositor
   // state on the compositor thread. (Compositor-Worker)