Update legacy Tuple-using code.

content/renderer/render_frame_proxy.cc

Index: content/renderer/render_frame_proxy.cc
diff --git a/content/renderer/render_frame_proxy.cc b/content/renderer/render_frame_proxy.cc
index 69194cbef8438fce13b88315f1115557101ab42a..635965a8fdbcb7c279033f57cd1301d082a10d56 100644
--- a/content/renderer/render_frame_proxy.cc
+++ b/content/renderer/render_frame_proxy.cc
@@ -196,18 +196,19 @@ void RenderFrameProxy::OnCompositorFrameSwapped(const IPC::Message& message) {
     return;
 
   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
-  param.a.frame.AssignTo(frame.get());
+  get<0>(param).frame.AssignTo(frame.get());
 
   if (!compositing_helper_.get()) {
     compositing_helper_ =
         ChildFrameCompositingHelper::CreateForRenderFrameProxy(this);
     compositing_helper_->EnableCompositing(true);
   }
-  compositing_helper_->OnCompositorFrameSwapped(frame.Pass(),
-                                                param.a.producing_route_id,
-                                                param.a.output_surface_id,
-                                                param.a.producing_host_id,
-                                                param.a.shared_memory_handle);
+  compositing_helper_->OnCompositorFrameSwapped(
+      frame.Pass(),
+      get<0>(param).producing_route_id,
+      get<0>(param).output_surface_id,
+      get<0>(param).producing_host_id,
+      get<0>(param).shared_memory_handle);
 }
 
 void RenderFrameProxy::OnDisownOpener() {