Revert of Fix to remove customised String over IPC for SmartClip

Source/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 229 matching lines @@
     virtual void setCompositorDeviceScaleFactorOverride(float) OVERRIDE;
     virtual void setRootLayerTransform(const WebSize& offset, float scale) OVERRIDE;
     virtual WebDevToolsAgent* devToolsAgent() OVERRIDE;
     virtual WebAXObject accessibilityObject() OVERRIDE;
     virtual void setSelectionColors(unsigned activeBackgroundColor,
                                     unsigned activeForegroundColor,
                                     unsigned inactiveBackgroundColor,
                                     unsigned inactiveForegroundColor) OVERRIDE;
     virtual void performCustomContextMenuAction(unsigned action) OVERRIDE;
     virtual void showContextMenu() OVERRIDE;
-    virtual void getSmartClipData(WebRect, WebString*, WebRect*) OVERRIDE;
+    virtual WebString getSmartClipData(WebRect) OVERRIDE;
     virtual void hidePopups() OVERRIDE;
     virtual void addPageOverlay(WebPageOverlay*, int /* zOrder */) OVERRIDE;
     virtual void removePageOverlay(WebPageOverlay*) OVERRIDE;
     virtual void transferActiveWheelFlingAnimation(const WebActiveWheelFlingParameters&) OVERRIDE;
     virtual bool endActiveFlingAnimation() OVERRIDE;
     virtual void setShowPaintRects(bool) OVERRIDE;
     void setShowDebugBorders(bool);
     virtual void setShowFPSCounter(bool) OVERRIDE;
     virtual void setContinuousPaintingEnabled(bool) OVERRIDE;
     virtual void setShowScrollBottleneckRects(bool) OVERRIDE;
@@ skipping 466 matching lines @@
     bool m_userGestureObserved;
 };
 
 // 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