Add UMA metrics for Android Chrome Google Search.

chrome/browser/prerender/prerender_manager.h

Index: chrome/browser/prerender/prerender_manager.h
diff --git a/chrome/browser/prerender/prerender_manager.h b/chrome/browser/prerender/prerender_manager.h
index 9118533223a773dcf219be9a302ad54bae6f68c8..a4ed83987bd47f1bbeba1e5e6a4fbc315329318e 100644
--- a/chrome/browser/prerender/prerender_manager.h
+++ b/chrome/browser/prerender/prerender_manager.h
@@ -360,6 +360,9 @@ class PrerenderManager : public base::SupportsWeakPtr<PrerenderManager>,
   // recorded.
   void RecordNetworkBytes(Origin origin, bool used, int64 prerender_bytes);
 
+  // Returns whether prerendering is currently enabled for this manager.
+  bool IsEnabled() const;
+
   // Add to the running tally of bytes transferred over the network for this
   // profile if prerendering is currently enabled.
   void AddProfileNetworkBytesIfEnabled(int64 bytes);
@@ -660,9 +663,6 @@ class PrerenderManager : public base::SupportsWeakPtr<PrerenderManager>,
       const GURL& url, Origin origin, uint8 experiment_id,
       FinalStatus final_status) const;
 
-  // Returns whether prerendering is currently enabled for this manager.
-  // Must be called on the UI thread.
-  bool IsEnabled() const;
 
   void CookieChanged(ChromeCookieDetails* details);
   void CookieChangedAnyCookiesLeftLookupResult(const std::string& domain_key,