Add Rappor metrics for Safe Browsing and SSL interstitials.

chrome/browser/safe_browsing/safe_browsing_blocking_page.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Classes for managing the SafeBrowsing interstitial pages.
 //
 // When a user is about to visit a page the SafeBrowsing system has deemed to
 // be malicious, either as malware or a phishing page, we show an interstitial
 // page with some options (go back, continue) to give the user a chance to avoid
 // the harmful page.
@@ skipping 173 matching lines @@
   static SafeBrowsingBlockingPageFactory* factory_;
 
  private:
   // Fills the passed dictionary with the values to be passed to the template
   // when creating the HTML.
   void PopulateExtendedReportingOption(base::DictionaryValue* load_time_data);
   void PopulateMalwareLoadTimeData(base::DictionaryValue* load_time_data);
   void PopulateHarmfulLoadTimeData(base::DictionaryValue* load_time_data);
   void PopulatePhishingLoadTimeData(base::DictionaryValue* load_time_data);
 
-  std::string GetHistogramPrefix() const;
+  std::string GetUmaHistogramPrefix() const;
+  std::string GetRapporMetricPrefix() const;
   std::string GetSamplingEventName() const;
 
   scoped_ptr<SecurityInterstitialUmaHelper> uma_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingBlockingPage);
 };
 
 // Factory for creating SafeBrowsingBlockingPage.  Useful for tests.
 class SafeBrowsingBlockingPageFactory {
  public:
   virtual ~SafeBrowsingBlockingPageFactory() { }
 
   virtual SafeBrowsingBlockingPage* CreateSafeBrowsingPage(
       SafeBrowsingUIManager* ui_manager,
       content::WebContents* web_contents,
       const SafeBrowsingBlockingPage::UnsafeResourceList& unsafe_resources) = 0;
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_BLOCKING_PAGE_H_