Remove more mouse-specific code

sky/engine/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 53 matching lines @@
     virtual void close() override;
     virtual WebSize size() override;
 
     virtual void resize(const WebSize&) override;
 
     virtual void beginFrame(const WebBeginFrameArgs&) override;
 
     virtual void layout() override;
     virtual void paint(WebCanvas*, const WebRect&) override;
     virtual bool handleInputEvent(const WebInputEvent&) override;
-    virtual void mouseCaptureLost() override;
     virtual void setFocus(bool enable) override;
     virtual bool setComposition(
         const WebString& text,
         const WebVector<WebCompositionUnderline>& underlines,
         int selectionStart,
         int selectionEnd) override;
     virtual bool confirmComposition() override;
     virtual bool confirmComposition(ConfirmCompositionBehavior selectionBehavior) override;
     virtual bool confirmComposition(const WebString& text) override;
     virtual bool compositionRange(size_t* location, size_t* length) override;
@@ skipping 176 matching lines @@
     // associated WM_CHAR event if the keydown was handled. We emulate
     // this behavior by setting this flag if the keyDown was handled.
     bool m_suppressNextKeypressEvent;
 
     // Represents whether or not this object should process incoming IME events.
     bool m_imeAcceptEvents;
 
     // Whether the webview is rendering transparently.
     bool m_isTransparent;
 
-    // If set, the (plugin) node which has mouse capture.
-    RefPtr<Node> m_mouseCaptureNode;
-
     IntRect m_rootLayerScrollDamage;
     WebLayer* m_rootLayer;
     bool m_matchesHeuristicsForGpuRasterization;
     // If true, the graphics context is being restored.
     bool m_recreatingGraphicsContext;
     static const WebInputEvent* m_currentInputEvent;
 
     WebPoint m_positionOnFlingStart;
     WebPoint m_globalPositionOnFlingStart;
     int m_flingModifier;
     bool m_flingSourceDevice;
 
     bool m_showPaintRects;
     bool m_showDebugBorders;
     bool m_showScrollBottleneckRects;
     WebColor m_baseBackgroundColor;
     WebColor m_backgroundColorOverride;
 };
 
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_WEB_WEBVIEWIMPL_H_