Don't allow updating tabs to javascript URLs without host

chrome/browser/extensions/extension_function_dispatcher.cc

 // Copyright (c) 2009 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/browser/extensions/extension_function_dispatcher.h"
 
 #include "base/process_util.h"
 #include "base/singleton.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_bookmarks_module.h"
@@ skipping 227 matching lines @@
 }
 
 Browser* ExtensionFunctionDispatcher::GetBrowser() {
   return delegate_->GetBrowser();
 }
 
 ExtensionHost* ExtensionFunctionDispatcher::GetExtensionHost() {
   return delegate_->GetExtensionHost();
 }
 
+Extension* ExtensionFunctionDispatcher::GetExtension() {
+  ExtensionsService* service = profile()->GetExtensionsService();
+  DCHECK(service);
+
+  Extension* extension = service->GetExtensionById(extension_id());
+  DCHECK(extension);
+
+  return extension;
+}
+
 void ExtensionFunctionDispatcher::HandleRequest(const std::string& name,
                                                 const std::string& args,
                                                 int request_id,
                                                 bool has_callback) {
   scoped_refptr<ExtensionFunction> function(
       FactoryRegistry::instance()->NewFunction(name));
   function->set_dispatcher_peer(peer_);
   function->SetArgs(args);
   function->set_request_id(request_id);
   function->set_has_callback(has_callback);
@@ skipping 16 matching lines @@
   } else {
     NOTREACHED();
     base::KillProcess(render_view_host_->process()->process().handle(),
                       ResultCodes::KILLED_BAD_MESSAGE, false);
   }
 }
 
 Profile* ExtensionFunctionDispatcher::profile() {
   return render_view_host_->process()->profile();
 }