Custom frame UI for platform apps on Windows.

content/browser/renderer_host/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_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_H_
 #pragma once
 
 #if defined(OS_MACOSX)
 #include <OpenGL/OpenGL.h>
 #endif
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/process_util.h"
 #include "base/callback_forward.h"
 #include "content/common/content_export.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "third_party/skia/include/core/SkRegion.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPopupType.h"
 #include "ui/base/ime/text_input_type.h"
 #include "ui/base/range/range.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/surface/transport_dib.h"
 
 struct GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params;
 struct GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params;
 
@@ skipping 288 matching lines @@
   virtual void ProcessTouchAck(bool processed) = 0;
 
   virtual void SetHasHorizontalScrollbar(bool has_horizontal_scrollbar) = 0;
   virtual void SetScrollOffsetPinning(
       bool is_pinned_to_left, bool is_pinned_to_right) = 0;
 
   // Return value indicates whether the mouse is locked successfully or not.
   virtual bool LockMouse() = 0;
   virtual void UnlockMouse() = 0;
 
+  // The region specified will be transparent to mouse clicks.
+  virtual void SetTransparentRegion(SkRegion* region) {}
+
   void set_popup_type(WebKit::WebPopupType popup_type) {
     popup_type_ = popup_type;
   }
   WebKit::WebPopupType popup_type() const { return popup_type_; }
 
   // Subclasses should override this method to do what is appropriate to set
   // the custom background for their platform.
   CONTENT_EXPORT virtual void SetBackground(const SkBitmap& background);
   const SkBitmap& background() const { return background_; }
 
@@ skipping 40 matching lines @@
   ui::Range selection_range_;
 
  private:
   // Manager of the tree representation of the WebKit render tree.
   scoped_ptr<BrowserAccessibilityManager> browser_accessibility_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostView);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_H_