Add an IPC method for Blink to call RapporService::RecordSample()

chrome/browser/renderer_host/chrome_render_message_filter.h

Index: chrome/browser/renderer_host/chrome_render_message_filter.h
diff --git a/chrome/browser/renderer_host/chrome_render_message_filter.h b/chrome/browser/renderer_host/chrome_render_message_filter.h
index 00e959bbbdd684e699ebf8524085c2b09fe61563..0c6d8571677312610e7a1c19082ce000d86d6cdc 100644
--- a/chrome/browser/renderer_host/chrome_render_message_filter.h
+++ b/chrome/browser/renderer_host/chrome_render_message_filter.h
@@ -125,6 +125,8 @@ class ChromeRenderMessageFilter : public content::BrowserMessageFilter {
   // Called when a message is received from a renderer that a trial has been
   // activated (ChromeViewHostMsg_FieldTrialActivated).
   void OnFieldTrialActivated(const std::string& trial_name);
+  void OnRecordRappor(const std::string& metric, const std::string& sample);
+  void OnRecordRapporURL(const std::string& metric, const GURL& sample);
 
   const int render_process_id_;