Modify --isolate-extensions to not isolate hosted apps.

chrome/common/chrome_content_client.cc

 // 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.
 
 #include "chrome/common/chrome_content_client.h"
 
 #if defined(OS_LINUX)
 #include <fcntl.h>
 #endif  // defined(OS_LINUX)
 
@@ skipping 599 matching lines @@
   schemes->insert(extensions::kExtensionScheme);
   schemes->insert(extensions::kExtensionResourceScheme);
   GetSecureOriginWhitelist(origins);
 }
 
 void ChromeContentClient::AddServiceWorkerSchemes(
     std::set<std::string>* schemes) {
   schemes->insert(extensions::kExtensionScheme);
 }
 
-void ChromeContentClient::AddIsolatedSchemes(std::set<std::string>* schemes) {
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kIsolateExtensions)) {
-    schemes->insert(extensions::kExtensionScheme);
-  }
+bool ChromeContentClient::IsSupplementarySiteIsolationModeEnabled() {
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kIsolateExtensions);
 }