Add RAPPOR metrics of ServiceWorker.ControlledPage

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index fbe8214fd2462901e9ebf31f5630974233bfb58a..550d42a671e928a06bbda767ce8e098ead057440 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -626,6 +626,9 @@ class CONTENT_EXPORT ContentBrowserClient {
                        const OpenURLParams& params,
                        const base::Callback<void(WebContents*)>& callback);
 
+  // Records the url to collect the metric.

[nasko, 2015/02/26 14:52:44]

Let's follow the style of comments already present in this file. Something like
"Allows the embedder to record |metric| for a specific |url|".

[horo, 2015/02/27 00:59:14]

Done.

+  virtual void RecordURLMetric(const std::string& metric, const GURL& gurl) {}

[nasko, 2015/02/26 14:52:44]

nit: s/gurl/url/

[horo, 2015/02/27 00:59:14]

Done.

+
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   // Populates |mappings| with all files that need to be mapped before launching
   // a child process.