Update to Chromium revision cb947c01 (#352221)

- Implement CefRequestHandler::OnBeforeBrowse using NavigationThrottle
  instead of ResourceThrottle (see http://crbug.com/537634). The CefRequest
  object passed to OnBeforeBrowse will no longer have an associated request
  identifier.
- Mac: Remove additional helper apps which are no longer required (see
  http://crbug.com/520680)
- Remove the UR_FLAG_REPORT_RAW_HEADERS flag which is no longer supported (see
  http://crbug.com/517114)
- Remove the CefBrowserSettings.java parameter. Java is an NPAPI plugin and
  NPAPI plugins are no longer supported (see http://crbug.com/470301#c11)
- Add CefFormatUrlForSecurityDisplay function in cef_parser.h
- Fix crash when passing `--disable-extensions` command-line flag (issue #1721)
- Linux: Fix NSS handler loading (issue #1727)

libcef/browser/extensions/extension_system.h

@@ -56,6 +56,7 @@ class CefExtensionSystem : public ExtensionSystem {
   ExtensionService* extension_service() override;
   RuntimeData* runtime_data() override;
   ManagementPolicy* management_policy() override;
+  ServiceWorkerManager* service_worker_manager() override;
   SharedUserScriptMaster* shared_user_script_master() override;
   StateStore* state_store() override;
   StateStore* rules_store() override;
@@ -118,6 +119,7 @@ class CefExtensionSystem : public ExtensionSystem {
   // Data to be accessed on the IO thread. Must outlive process_manager_.
   scoped_refptr<InfoMap> info_map_;
 
+  scoped_ptr<ServiceWorkerManager> service_worker_manager_;
   scoped_ptr<RuntimeData> runtime_data_;
   scoped_ptr<QuotaService> quota_service_;
   scoped_ptr<AppSorting> app_sorting_;