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 bfae0c2414406717893f98f7a8df07f750eac9a3..2da88e5b133a12567f72452ce32788762975fd04 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::HandleCompositorProto(
+    RenderWidgetHostImpl* render_widget_host,
+    const std::vector<char>& proto) {
+  if (render_widget_host != GetRenderViewHost()->GetWidget())
+    return;
+
+  if (delegate_)
+    delegate_->HandleCompositorProto(proto);
+}
+
 void WebContentsImpl::CreateNewWindow(
     SiteInstance* source_site_instance,
     int32_t route_id,