Add flag to enable immersive fullscreen for v2 apps

chrome/browser/ui/views/apps/native_app_window_views.h

Index: chrome/browser/ui/views/apps/native_app_window_views.h
diff --git a/chrome/browser/ui/views/apps/native_app_window_views.h b/chrome/browser/ui/views/apps/native_app_window_views.h
index 39e604e96ab9c66e59908777ee40a40d057ac395..272f8febab1da71da36e54af7ffa7a4cd416896a 100644
--- a/chrome/browser/ui/views/apps/native_app_window_views.h
+++ b/chrome/browser/ui/views/apps/native_app_window_views.h
@@ -20,6 +20,12 @@
 #include "chrome/browser/shell_integration.h"
 #endif
 
+#if defined(USE_ASH)
+namespace ash {
+class ImmersiveFullscreenController;
+}
+#endif
+
 class ExtensionKeybindingRegistryViews;
 class Profile;
 
@@ -138,8 +144,8 @@ class NativeAppWindowViews : public apps::NativeAppWindow,
   virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
 
   // NativeAppWindow implementation.
-  virtual void SetFullscreen(bool fullscreen) OVERRIDE;
-  virtual bool IsFullscreenOrPending() const OVERRIDE;
+  virtual void SetFullscreen(apps::ShellWindow::FullscreenType type) OVERRIDE;
+  virtual bool SupportsImmersiveFullscreen() const OVERRIDE;
   virtual bool IsDetached() const OVERRIDE;
   virtual void UpdateWindowIcon() OVERRIDE;
   virtual void UpdateWindowTitle() OVERRIDE;
@@ -193,10 +199,19 @@ class NativeAppWindowViews : public apps::NativeAppWindow,
 
   views::UnhandledKeyboardEventHandler unhandled_keyboard_event_handler_;
 
-  base::WeakPtrFactory<NativeAppWindowViews> weak_ptr_factory_;
+#if defined(USE_ASH)
+  // Used to put non-frameless windows into immersive fullscreen on ChromeOS. In
+  // immersive fullscreen, the window header (title bar and window controls)
+  // slides onscreen as an overlay when the mouse is hovered at the top of the
+  // screen.
+  scoped_ptr<ash::ImmersiveFullscreenController>
+      immersive_fullscreen_controller_;
+#endif
 
   ObserverList<web_modal::ModalDialogHostObserver> observer_list_;
 
+  base::WeakPtrFactory<NativeAppWindowViews> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(NativeAppWindowViews);
 };