Add flag to enable immersive fullscreen for v2 apps

ash/wm/caption_buttons/frame_caption_button_container_view.h

 // Copyright 2013 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_WM_CAPTION_BUTTONS_FRAME_CAPTION_BUTTON_CONTAINER_VIEW_H_
 #define ASH_WM_CAPTION_BUTTONS_FRAME_CAPTION_BUTTON_CONTAINER_VIEW_H_
 
 #include "ash/ash_export.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/view.h"
 
 namespace views {
 class CustomButton;
 class Widget;
 }
 
 namespace ash {
+class FrameMaximizeButton;
 
 // Container view for the frame caption buttons. It performs the appropriate
 // action when a caption button is clicked.
 class ASH_EXPORT FrameCaptionButtonContainerView
     : public views::View,
       public views::ButtonListener {
  public:
   static const char kViewClassName[];
 
   // Whether the frame can be minimized (either via the maximize/restore button
@@ skipping 40 matching lines @@
     views::CustomButton* close_button() const {
       return container_view_->close_button_;
     }
 
    private:
     FrameCaptionButtonContainerView* container_view_;
 
     DISALLOW_COPY_AND_ASSIGN(TestApi);
   };
 
+  // Returns the size button if using the old caption button style, returns NULL
+  // otherwise.
+  FrameMaximizeButton* GetOldStyleSizeButton() const;

[oshima, 2013/11/08 23:25:32]

no const when returning non const internal object.

+
   // Tell the window controls to reset themselves to the normal state.
   void ResetWindowControls();
 
   // Determines the window HT* code for the caption button at |point|. Returns
   // HTNOWHERE if |point| is not over any of the caption buttons. |point| must
   // be in the coordinates of the FrameCaptionButtonContainerView.
   int NonClientHitTest(const gfx::Point& point) const;
 
   // Sets the header style.
   void set_header_style(HeaderStyle header_style) {
@@ skipping 46 matching lines @@
   views::CustomButton* minimize_button_;
   views::CustomButton* size_button_;
   views::CustomButton* close_button_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameCaptionButtonContainerView);
 };
 
 }  // namesapace ash
 
 #endif  // ASH_WM_CAPTION_BUTTONS_FRAME_CAPTION_BUTTON_CONTAINER_VIEW_H_