Plumb site engagement to the renderer process.

third_party/WebKit/public/web/WebLocalFrame.h

Index: third_party/WebKit/public/web/WebLocalFrame.h
diff --git a/third_party/WebKit/public/web/WebLocalFrame.h b/third_party/WebKit/public/web/WebLocalFrame.h
index a650b6fdd511425e6de5ed50782712bd0fdb9a69..944d8a711d4710e7b88fc6e99bbd75f933c71c85 100644
--- a/third_party/WebKit/public/web/WebLocalFrame.h
+++ b/third_party/WebKit/public/web/WebLocalFrame.h
@@ -11,6 +11,7 @@
 #include "WebHistoryItem.h"
 #include "public/platform/WebCachePolicy.h"
 #include "public/platform/WebURLError.h"
+#include "public/platform/site_engagement.mojom-shared.h"
 
 namespace blink {
 
@@ -433,6 +434,11 @@ class WebLocalFrame : public WebFrame {
   // coordinates.
   virtual void saveImageAt(const WebPoint&) = 0;
 
+  // Site engagement --------------------------------------------------------
+
+  // Sets the site engagement level for this frame's document.
+  virtual void setEngagementLevel(mojom::EngagementLevel) = 0;
+
   // TEMP: Usage count for chrome.loadtimes deprecation.
   // This will be removed following the deprecation.
   virtual void usageCountChromeLoadTimes(const WebString& metric) = 0;