Enable CSP on more WebUI pages

chrome/browser/ui/webui/app_launcher_page_ui.h

 // Copyright (c) 2013 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 CHROME_BROWSER_UI_WEBUI_APP_LAUNCHER_PAGE_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_APP_LAUNCHER_PAGE_UI_H_
 
 #include "base/macros.h"
 #include "content/public/browser/url_data_source.h"
 #include "content/public/browser/web_ui_controller.h"
@@ skipping 27 matching lines @@
 
     // content::URLDataSource implementation.
     std::string GetSource() const override;
     void StartDataRequest(
         const std::string& path,
         int render_process_id,
         int render_frame_id,
         const content::URLDataSource::GotDataCallback& callback) override;
     std::string GetMimeType(const std::string&) const override;
     bool ShouldReplaceExistingSource() const override;
-    bool ShouldAddContentSecurityPolicy() const override;
+    std::string GetContentSecurityPolicyScriptSrc() const override;
+    std::string GetContentSecurityPolicyStyleSrc() const override;
+    std::string GetContentSecurityPolicyImgSrc() const override;
 
    private:
 
     // Pointer back to the original profile.
     Profile* profile_;
 
     DISALLOW_COPY_AND_ASSIGN(HTMLSource);
   };
 
   Profile* GetProfile() const;
 
   DISALLOW_COPY_AND_ASSIGN(AppLauncherPageUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_APP_LAUNCHER_PAGE_UI_H_