Make Satisfy/Require callbacks pass Surface id and sequence by reference

content/renderer/child_frame_compositing_helper.cc

Index: content/renderer/child_frame_compositing_helper.cc
diff --git a/content/renderer/child_frame_compositing_helper.cc b/content/renderer/child_frame_compositing_helper.cc
index cc2ba004c4d0ef80aea5ef37152d78001b094e9e..9b98bc69ec18c0246a18eb17b872a63aa8699204 100644
--- a/content/renderer/child_frame_compositing_helper.cc
+++ b/content/renderer/child_frame_compositing_helper.cc
@@ -149,7 +149,7 @@ void ChildFrameCompositingHelper::ChildFrameGone() {
 void ChildFrameCompositingHelper::SatisfyCallback(
     scoped_refptr<ThreadSafeSender> sender,
     int host_routing_id,
-    cc::SurfaceSequence sequence) {
+    const cc::SurfaceSequence& sequence) {
   // This may be called on either the main or impl thread.
   sender->Send(new FrameHostMsg_SatisfySequence(host_routing_id, sequence));
 }
@@ -159,7 +159,7 @@ void ChildFrameCompositingHelper::SatisfyCallbackBrowserPlugin(
     scoped_refptr<ThreadSafeSender> sender,
     int host_routing_id,
     int browser_plugin_instance_id,
-    cc::SurfaceSequence sequence) {
+    const cc::SurfaceSequence& sequence) {
   sender->Send(new BrowserPluginHostMsg_SatisfySequence(
       host_routing_id, browser_plugin_instance_id, sequence));
 }
@@ -168,8 +168,8 @@ void ChildFrameCompositingHelper::SatisfyCallbackBrowserPlugin(
 void ChildFrameCompositingHelper::RequireCallback(
     scoped_refptr<ThreadSafeSender> sender,
     int host_routing_id,
-    cc::SurfaceId id,
-    cc::SurfaceSequence sequence) {
+    const cc::SurfaceId& id,
+    const cc::SurfaceSequence& sequence) {
   // This may be called on either the main or impl thread.
   sender->Send(new FrameHostMsg_RequireSequence(host_routing_id, id, sequence));
 }
@@ -178,8 +178,8 @@ void ChildFrameCompositingHelper::RequireCallbackBrowserPlugin(
     scoped_refptr<ThreadSafeSender> sender,
     int host_routing_id,
     int browser_plugin_instance_id,
-    cc::SurfaceId id,
-    cc::SurfaceSequence sequence) {
+    const cc::SurfaceId& id,
+    const cc::SurfaceSequence& sequence) {
   // This may be called on either the main or impl thread.
   sender->Send(new BrowserPluginHostMsg_RequireSequence(
       host_routing_id, browser_plugin_instance_id, id, sequence));