Add frame color option to packaged app windows.

apps/ui/native_app_window.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 APPS_UI_NATIVE_APP_WINDOW_H_
 #define APPS_UI_NATIVE_APP_WINDOW_H_
 
 #include "apps/app_window.h"
 #include "components/web_modal/web_contents_modal_dialog_host.h"
+#include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/base_window.h"
 #include "ui/gfx/insets.h"
 
 namespace apps {
 
 // This is an interface to a native implementation of a app window, used for
 // new-style packaged apps. App windows contain a web contents, but no tabs
 // or URL bar.
 class NativeAppWindow : public ui::BaseWindow,
                         public web_modal::WebContentsModalDialogHost {
@@ skipping 30 matching lines @@
 
   // Allows the window to handle unhandled keyboard messages coming back from
   // the renderer.
   virtual void HandleKeyboardEvent(
       const content::NativeWebKeyboardEvent& event) = 0;
 
   // Returns true if the window has no frame, as for a window opened by
   // chrome.app.window.create with the option 'frame' set to 'none'.
   virtual bool IsFrameless() const = 0;
 
+  // Returns information about the window's frame.
+  virtual bool HasFrameColor() const = 0;
+  virtual SkColor FrameColor() const = 0;
+
   // Returns the difference between the window bounds (including titlebar and
   // borders) and the content bounds, if any.
   virtual gfx::Insets GetFrameInsets() const = 0;
 
   // Hide or show this window as part of hiding or showing the app.
   // This may have different logic to Hide, Show, and ShowInactive as those are
   // called via the AppWindow javascript API.
   virtual void ShowWithApp() = 0;
   virtual void HideWithApp() = 0;
 
   // Updates the minimum and maximum size of the native window with the current
   // size constraints.
   virtual void UpdateWindowMinMaxSize() = 0;
 
   virtual ~NativeAppWindow() {}
 };
 
 }  // namespace apps
 
 #endif  // APPS_UI_NATIVE_APP_WINDOW_H_