Make browser windows override_redirect when dragging tabs.

ash/host/ash_window_tree_host_x11.h

 // Copyright 2014 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 ASH_HOST_ASH_WINDOW_TREE_HOST_X11_H_
 #define ASH_HOST_ASH_WINDOW_TREE_HOST_X11_H_
 
 #include "ash/ash_export.h"
 #include "ash/host/ash_window_tree_host.h"
 #include "ash/host/transformer_helper.h"
@@ skipping 16 matching lines @@
   // AshWindowTreeHost:
   void ToggleFullScreen() override;
   bool ConfineCursorToRootWindow() override;
   void UnConfineCursor() override;
   void SetRootWindowTransformer(
       scoped_ptr<RootWindowTransformer> transformer) override;
   gfx::Insets GetHostInsets() const override;
   aura::WindowTreeHost* AsWindowTreeHost() override;
   void PrepareForShutdown() override;
 
-  // aura::WindowTreehost:
+  // aura::WindowTreeHost:
   void SetBounds(const gfx::Rect& bounds) override;
   gfx::Transform GetRootTransform() const override;
   void SetRootTransform(const gfx::Transform& transform) override;
   gfx::Transform GetInverseRootTransform() const override;
   void UpdateRootWindowSize(const gfx::Size& host_size) override;
   void OnCursorVisibilityChangedNative(bool show) override;
+  void RemapAsNormalWindow() override;
 
   // aura::WindowTreeHostX11:
   void OnConfigureNotify() override;
   bool CanDispatchEvent(const ui::PlatformEvent& event) override;
   void TranslateAndDispatchLocatedEvent(ui::LocatedEvent* event) override;
 
   // EnvObserver overrides.
   void OnWindowInitialized(aura::Window* window) override;
   void OnHostInitialized(aura::WindowTreeHost* host) override;
 
@@ skipping 10 matching lines @@
   scoped_ptr<XID[]> pointer_barriers_;
 
   TransformerHelper transformer_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(AshWindowTreeHostX11);
 };
 
 }  // namespace ash
 
 #endif  // ASH_HOST_ASH_WINDOW_TREE_HOST_X11_H_