Add shortcut to create new window for GTK content shell.

content/shell/shell.h

 // 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.
 
 #ifndef CONTENT_SHELL_SHELL_H_
 #define CONTENT_SHELL_SHELL_H_
 
 
 #include <vector>
 
@@ skipping 164 matching lines @@
 #elif defined(TOOLKIT_GTK)
   CHROMEGTK_CALLBACK_0(Shell, void, OnBackButtonClicked);
   CHROMEGTK_CALLBACK_0(Shell, void, OnForwardButtonClicked);
   CHROMEGTK_CALLBACK_0(Shell, void, OnReloadButtonClicked);
   CHROMEGTK_CALLBACK_0(Shell, void, OnStopButtonClicked);
   CHROMEGTK_CALLBACK_0(Shell, void, OnURLEntryActivate);
   CHROMEGTK_CALLBACK_0(Shell, gboolean, OnWindowDestroyed);
 
   CHROMEG_CALLBACK_3(Shell, gboolean, OnCloseWindowKeyPressed, GtkAccelGroup*,
                      GObject*, guint, GdkModifierType);
+  CHROMEG_CALLBACK_3(Shell, gboolean, OnNewWindowKeyPressed, GtkAccelGroup*,
+                     GObject*, guint, GdkModifierType);
   CHROMEG_CALLBACK_3(Shell, gboolean, OnHighlightURLView, GtkAccelGroup*,
                      GObject*, guint, GdkModifierType);
 #endif
 
   scoped_ptr<ShellJavaScriptDialogCreator> dialog_creator_;
 
   scoped_ptr<WebContents> web_contents_;
 
   gfx::NativeWindow window_;
   gfx::NativeEditView url_edit_view_;
@@ skipping 33 matching lines @@
   static base::Callback<void(Shell*)> shell_created_callback_;
 
   // True if the destructur of Shell should post a quit closure on the current
   // message loop if the destructed Shell object was the last one.
   static bool quit_message_loop_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_SHELL_H_