cc: Adding creation location to debug BeginFrameArgs objects.

cc/trees/single_thread_proxy.cc

Index: cc/trees/single_thread_proxy.cc
diff --git a/cc/trees/single_thread_proxy.cc b/cc/trees/single_thread_proxy.cc
index a3f66b779914a9a08c30710bf100c22fb492d178..a9f06d920d607e148ca26b08023f6d2eac457fa6 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -493,8 +493,8 @@ void SingleThreadProxy::CompositeImmediately(base::TimeTicks frame_begin_time) {
 
   {
     BeginFrameArgs begin_frame_args(BeginFrameArgs::Create(
-        frame_begin_time, base::TimeTicks(), BeginFrameArgs::DefaultInterval(),
-        BeginFrameArgs::SYNCHRONOUS));
+        BEGINFRAME_FROM_HERE, frame_begin_time, base::TimeTicks(),
+        BeginFrameArgs::DefaultInterval(), BeginFrameArgs::SYNCHRONOUS));
     DoBeginMainFrame(begin_frame_args);
     DoCommit();