Add IPC messages to transfer compositor protos

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 87a4af1841fff18249f7dba3f905f95de9790fb2..f882aad92a3d76eb18f45594ea933cb226c9e5e5 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -1696,6 +1696,16 @@ void WebContentsImpl::LostMouseLock(RenderWidgetHostImpl* render_widget_host) {
     delegate_->LostMouseLock();
 }
 
+void WebContentsImpl::ForwardCompositorProto(
+    RenderWidgetHostImpl* render_widget_host,
+    const std::vector<char>& proto) {
+  if (render_widget_host != GetRenderViewHost()->GetWidget())

[enne (OOO), 2015/11/16 19:00:28]

When would this happen?

[David Trainor- moved to gerrit, 2015/11/16 19:48:07]

It looks like a few methods do this before processing the method call.  I think
we just don't want to ever send messages for a swapped out RVH at this point.

+    return;
+
+  if (delegate_)
+    delegate_->ForwardCompositorProto(proto);
+}
+
 void WebContentsImpl::CreateNewWindow(
     SiteInstance* source_site_instance,
     int32_t route_id,