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 5582fb55ff94d3324b0e821f7570388a09147b6f..93b5641e7dda7ed2f1942fb1c344689450c924bd 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1067,6 +1067,11 @@ 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);
   if (iter != g_frame_map.Get().end())