<browser> Make new implementation the default.

chrome/renderer/extensions/dispatcher.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/renderer/extensions/dispatcher.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string_piece.h"
@@ skipping 674 matching lines @@
   source_map_.RegisterSource("tabs", IDR_TABS_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("tts", IDR_TTS_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("ttsEngine", IDR_TTS_ENGINE_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("types", IDR_TYPES_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("webRequest", IDR_WEB_REQUEST_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("webRequestInternal",
                              IDR_WEB_REQUEST_INTERNAL_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("webstore", IDR_WEBSTORE_CUSTOM_BINDINGS_JS);
 
   // Platform app sources that are not API-specific..
-  source_map_.RegisterSource("browserTag", IDR_BROWSER_TAG_JS);
+  const CommandLine& command_line = *(CommandLine::ForCurrentProcess());
+  if (command_line.HasSwitch(switches::kEnableBrowserPluginOldImplementation))
+    source_map_.RegisterSource("browserTag", IDR_BROWSER_TAG_OLD_JS);
+  else
+    source_map_.RegisterSource("browserTag", IDR_BROWSER_TAG_JS);
   source_map_.RegisterSource("platformApp", IDR_PLATFORM_APP_JS);
   source_map_.RegisterSource("injectAppTitlebar", IDR_INJECT_APP_TITLEBAR_JS);
 }
 
 void Dispatcher::PopulateLazyBindingsMap() {
   lazy_bindings_map_["app"] = InstallAppBindings;
   lazy_bindings_map_["webstore"] = InstallWebstoreBindings;
 }
 
 void Dispatcher::InstallBindings(ModuleSystem* module_system,
@@ skipping 410 matching lines @@
   // we should abort.
   WebKit::WebFrame* frame = context->web_frame();
   ExtensionURLInfo url_info(frame->document().securityOrigin(),
       UserScriptSlave::GetDataSourceURLForFrame(frame));
   CHECK(!extensions_.IsSandboxedPage(url_info));
 
   return true;
 }
 
 }  // namespace extensions