Custom frame UI for platform apps on Windows.

content/public/browser/render_widget_host_view.h

 // Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_H_
 #pragma once
 
 #if defined(TOOLKIT_USES_GTK)
 #include <gdk/gdk.h>
 #endif
 
 #include "content/common/content_export.h"
 #include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkRegion.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
 #include "ui/gfx/native_widget_types.h"
 
 class BrowserAccessibilityManager;
 class RenderWidgetHost;
 
 namespace gfx {
 class Rect;
 class Size;
 }
@@ skipping 104 matching lines @@
 
   // Subclasses should override this method to do what is appropriate to set
   // the custom background for their platform.
   virtual void SetBackground(const SkBitmap& background) = 0;
   virtual const SkBitmap& GetBackground() = 0;
 
   // TODO(joi): Remove this when we remove the dependency by chrome/
   // on browser_accessibility* files in content.
   virtual BrowserAccessibilityManager*
       GetBrowserAccessibilityManager() const = 0;
+
+#if defined(OS_WIN) && !defined(USE_AURA)
+  // The region specified will be transparent to mouse clicks.
+  virtual void SetClickthroughRegion(SkRegion* region) {}
+#endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_H_