Move native_app_window code to apps areas

apps/shell_window.h

Index: apps/shell_window.h
diff --git a/apps/shell_window.h b/apps/shell_window.h
index 5e449df2dcf572dea3968070921c613f583c70b7..22a4795acf466ed5e291aca68d09cb53c2d94e33 100644
--- a/apps/shell_window.h
+++ b/apps/shell_window.h
@@ -20,7 +20,6 @@
 
 class GURL;
 class Profile;
-class NativeAppWindow;
 class SkRegion;
 
 namespace content {
@@ -41,6 +40,8 @@ class BaseWindow;
 
 namespace apps {
 
+class NativeAppWindow;
+
 // Manages the web contents for Shell Windows. The implementation for this
 // class should create and maintain the WebContents for the window, and handle
 // any message passing between the web contents and the extension system or
@@ -128,6 +129,9 @@ class ShellWindow : public content::NotificationObserver,
 
     // General initialization.
     virtual void InitWebContents(content::WebContents* web_contents) = 0;
+    virtual NativeAppWindow* CreateNativeAppWindow(
+        ShellWindow* window,
+        const ShellWindow::CreateParams& params) = 0;

[tapted, 2013/08/01 07:18:59]

maybe remove the extra ShellWindow:: on CreateParams? I think that will work,
but there might be a case to keep it.

[benwells, 2013/08/01 08:19:39]

Done.

 
     // Link handling.
     virtual content::WebContents* OpenURLFromTab(