Propogate loading behavior data from Blink to content/

content/public/renderer/render_frame_observer.h

Index: content/public/renderer/render_frame_observer.h
diff --git a/content/public/renderer/render_frame_observer.h b/content/public/renderer/render_frame_observer.h
index ea2ba2b7035df6252c77e9ba80eb75620c01f59b..38ba46ffaebbeaf2fed2cf059a3b0189d9049a7c 100644
--- a/content/public/renderer/render_frame_observer.h
+++ b/content/public/renderer/render_frame_observer.h
@@ -13,6 +13,7 @@
 #include "content/common/content_export.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
+#include "third_party/WebKit/public/platform/WebExperimentData.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 #include "third_party/WebKit/public/web/WebMeaningfulLayout.h"
 #include "v8/include/v8.h"
@@ -112,6 +113,9 @@ class CONTENT_EXPORT RenderFrameObserver : public IPC::Listener,
   // Notifications when |PerformanceTiming| data becomes available
   virtual void DidChangePerformanceTiming() {}
 
+  // Notification when renderer uses an experimental feature.
+  virtual void DidUseExperiment(blink::WebExperimentData data) {}
+
   // Called when the focused node has changed to |node|.
   virtual void FocusedNodeChanged(const blink::WebNode& node) {}