Content API changes to improve DOM stitching in ThreatDetails code.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 572f9330f4b53b3d8accd08a7b9290f62b31c346..9f3b01ccfab377eeabd77055aec93ce6ab794a04 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1062,6 +1062,11 @@ void RenderFrame::ForEach(RenderFrameVisitor* visitor) {
   }
 }
 
+// static
+int RenderFrame::GetRoutingIdForWebFrame(blink::WebFrame* web_frame) {
+  return GetRoutingIdForFrameOrProxy(web_frame);
+}
+
 // static
 RenderFrameImpl* RenderFrameImpl::FromWebFrame(blink::WebFrame* web_frame) {
   FrameMap::iterator iter = g_frame_map.Get().find(web_frame);