Pipe the devTools FrameId from blink into the browser for headless

third_party/WebKit/Source/web/LocalFrameClientImpl.cpp

Index: third_party/WebKit/Source/web/LocalFrameClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/LocalFrameClientImpl.cpp b/third_party/WebKit/Source/web/LocalFrameClientImpl.cpp
index 178694bd4e2d29f283da726c09f63512f813db43..32a2f916661d7f090ae452e69a307af2c706d952 100644
--- a/third_party/WebKit/Source/web/LocalFrameClientImpl.cpp
+++ b/third_party/WebKit/Source/web/LocalFrameClientImpl.cpp
@@ -988,6 +988,11 @@ void LocalFrameClientImpl::SetHasReceivedUserGesture(bool received_previously) {
     autofill_client->UserGestureObserved();
 }
 
+void LocalFrameClientImpl::SetDevToolsFrameId(const String& devtools_frame_id) {
+  if (web_frame_->Client())
+    web_frame_->Client()->SetDevToolsFrameId(devtools_frame_id);
+}
+
 void LocalFrameClientImpl::AbortClientNavigation() {
   if (web_frame_->Client())
     web_frame_->Client()->AbortClientNavigation();