Move SecurityInterstitialPage into component

components/security_interstitials/core/controller_client.h

 // Copyright 2015 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.
 
 #ifndef COMPONENTS_SECURITY_INTERSTITIALS_CORE_CONTROLLER_CLIENT_H_
 #define COMPONENTS_SECURITY_INTERSTITIALS_CORE_CONTROLLER_CLIENT_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 71 matching lines @@
 
   // Reload the blocked page to see if it succeeds now.
   virtual void Reload() = 0;
 
   MetricsHelper* metrics_helper() const;
 
   virtual void OpenUrlInCurrentTab(const GURL& url) = 0;
 
   virtual PrefService* GetPrefService() = 0;
 
+  virtual const std::string& GetApplicationLocale() const = 0;
+
  protected:
-  virtual const std::string& GetApplicationLocale() = 0;
-  virtual const std::string GetExtendedReportingPrefName() = 0;
+  virtual const std::string GetExtendedReportingPrefName() const = 0;
 
  private:
   std::unique_ptr<MetricsHelper> metrics_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(ControllerClient);
 };
 
 }  // namespace security_interstitials
 
 #endif  // COMPONENTS_SECURITY_INTERSTITIALS_CORE_CONTROLLER_CLIENT_H_