Add the ability to resize the window when over the custom frame.

chrome/browser/gtk/browser_toolbar_gtk.h

 // 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.
 
 #ifndef CHROME_BROWSER_GTK_BROWSER_TOOLBAR_GTK_H_
 #define CHROME_BROWSER_GTK_BROWSER_TOOLBAR_GTK_H_
 
 #include <gtk/gtk.h>
 #include <string>
 
@@ skipping 29 matching lines @@
   // Create the contents of the toolbar. |top_level_window| is the GtkWindow
   // to which we attach our accelerators.
   void Init(Profile* profile, GtkWindow* top_level_window);
 
   // Adds this GTK toolbar into a sizing box.
   void AddToolbarToBox(GtkWidget* box);
 
   void Show();
   void Hide();
 
+  // Getter for the containing widget.
+  GtkWidget* widget() {
+    return toolbar_;
+  }
+
   virtual LocationBar* GetLocationBar() const;
 
   GoButtonGtk* GetGoButton() { return go_.get(); }
 
   // Overridden from CommandUpdater::CommandObserver:
   virtual void EnabledStateChangedForCommand(int id, bool enabled);
 
   // Overridden from MenuGtk::Delegate:
   virtual bool IsCommandEnabled(int command_id) const;
   virtual bool IsItemChecked(int id) const;
@@ skipping 95 matching lines @@
   // Controls whether or not a home button should be shown on the toolbar.
   BooleanPrefMember show_home_button_;
 
   // The event state the last time we observed a button release event.
   int last_release_event_flags_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserToolbarGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_BROWSER_TOOLBAR_GTK_H_