cc: Remove ThreadProxy dependency on LTHI::CurrentBeginFrameArgs

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 9ddf997d2a88cbf1103b9e30986c9082eafbc17b..00e03e8fd21926792d1d91c0c4de41a1b19c35c9 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -726,7 +726,8 @@ void SingleThreadProxy::WillBeginImplFrame(const BeginFrameArgs& args) {
   layer_tree_host_impl_->WillBeginImplFrame(args);
 }
 
-void SingleThreadProxy::ScheduledActionSendBeginMainFrame() {
+void SingleThreadProxy::ScheduledActionSendBeginMainFrame(
+    const BeginFrameArgs& begin_frame_args) {
   TRACE_EVENT0("cc", "SingleThreadProxy::ScheduledActionSendBeginMainFrame");
   // Although this proxy is single-threaded, it's problematic to synchronously
   // have BeginMainFrame happen after ScheduledActionSendBeginMainFrame.  This
@@ -739,8 +740,6 @@ void SingleThreadProxy::ScheduledActionSendBeginMainFrame() {
   DCHECK(inside_impl_frame_)
       << "BeginMainFrame should only be sent inside a BeginImplFrame";
 #endif
-  const BeginFrameArgs& begin_frame_args =
-      layer_tree_host_impl_->CurrentBeginFrameArgs();
 
   MainThreadTaskRunner()->PostTask(
       FROM_HERE, base::Bind(&SingleThreadProxy::BeginMainFrame,