Extract NativeAppWindow from src/extensions

chrome/browser/extensions/api/tabs/ash_panel_contents.h

Index: chrome/browser/extensions/api/tabs/ash_panel_contents.h
diff --git a/chrome/browser/extensions/api/tabs/ash_panel_contents.h b/chrome/browser/extensions/api/tabs/ash_panel_contents.h
index 838446462bd1d20c9a8814edb711892ee71391e1..420368a51ff6d91302c0d674b581307a9139efc5 100644
--- a/chrome/browser/extensions/api/tabs/ash_panel_contents.h
+++ b/chrome/browser/extensions/api/tabs/ash_panel_contents.h
@@ -21,10 +21,6 @@ namespace content {
 class RenderViewHost;
 }
 
-namespace extensions {
-struct DraggableRegion;
-}
-
 // extensions::AppWindowContents class specific to panel windows created by v1
 // extenstions. This class maintains a WebContents instance and observes it for
 // the purpose of passing messages to the extensions system. It also creates
@@ -44,7 +40,7 @@ class AshPanelContents
                           const GURL& url) OVERRIDE;
   virtual void LoadContents(int32 creator_process_id) OVERRIDE;
   virtual void NativeWindowChanged(
-      extensions::NativeAppWindow* native_app_window) OVERRIDE;
+      native_app_window::NativeAppWindow* native_app_window) OVERRIDE;
   virtual void NativeWindowClosed() OVERRIDE;
   virtual void DispatchWindowShownForTests() const OVERRIDE;
   virtual content::WebContents* GetWebContents() const OVERRIDE;