Expand tap highlight to allow multiple highlights for touch disambiguation.

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 498 matching lines @@
                                    WebCore::ScrollGranularity* scrollGranularity);
 
     // Called by a full frame plugin inside this view to inform it that its
     // zoom level has been updated.  The plugin should only call this function
     // if the zoom change was triggered by the browser, it's only needed in case
     // a plugin can update its own zoom, say because of its own UI.
     void fullFramePluginZoomLevelChanged(double zoomLevel);
 
     void computeScaleAndScrollForBlockRect(const WebRect& blockRect, float padding, float defaultScaleWhenAlreadyLegible, float& scale, WebPoint& scroll);
     WebCore::Node* bestTapNode(const WebCore::PlatformGestureEvent& tapEvent);
-    void enableTapHighlight(const WebCore::PlatformGestureEvent& tapEvent);
+    void enableTapHighlightAtPoint(const WebCore::PlatformGestureEvent& tapEvent);
+    void enableTapHighlights(Vector<WebCore::Node*>&);
     void computeScaleAndScrollForFocusedNode(WebCore::Node* focusedNode, float& scale, WebCore::IntPoint& scroll, bool& needAnimation);
 
     void animateDoubleTapZoom(const WebCore::IntPoint&);
 
     void enableFakePageScaleAnimationForTesting(bool);
     bool fakeDoubleTapAnimationPendingForTesting() const { return m_doubleTapZoomPending; }
     WebCore::IntPoint fakePageScaleAnimationTargetPositionForTesting() const { return m_fakePageScaleAnimationTargetPosition; }
     float fakePageScaleAnimationPageScaleForTesting() const { return m_fakePageScaleAnimationPageScaleFactor; }
     bool fakePageScaleAnimationUseAnchorForTesting() const { return m_fakePageScaleAnimationUseAnchor; }
 
@@ skipping 11 matching lines @@
     // disable the system cursor.
     virtual bool requestPointerLock();
     virtual void requestPointerUnlock();
     virtual bool isPointerLocked();
 
     // Heuristic-based function for determining if we should disable workarounds
     // for viewing websites that are not optimized for mobile devices.
     bool shouldDisableDesktopWorkarounds();
 
     // Exposed for tests.
-    LinkHighlight* linkHighlight() { return m_linkHighlight.get(); }
+    unsigned numLinkHighlights() { return m_linkHighlights.size(); }
+    LinkHighlight* linkHighlight(int i) { return m_linkHighlights[i].get(); }
 
     WebSettingsImpl* settingsImpl();
 
     // Returns the bounding box of the block type node touched by the WebRect.
     WebRect computeBlockBounds(const WebRect&, bool ignoreClipping);
 
     WebCore::IntPoint clampOffsetAtScale(const WebCore::IntPoint& offset, float scale);
 
     // Exposed for tests.
     WebVector<WebCompositionUnderline> compositionUnderlines() const;
@@ skipping 241 matching lines @@
     UserMediaClientImpl m_userMediaClientImpl;
     OwnPtr<MIDIClientProxy> m_midiClientProxy;
 #if ENABLE(NAVIGATOR_CONTENT_UTILS)
     OwnPtr<NavigatorContentUtilsClientImpl> m_navigatorContentUtilsClient;
 #endif
     OwnPtr<WebActiveGestureAnimation> m_gestureAnimation;
     WebPoint m_positionOnFlingStart;
     WebPoint m_globalPositionOnFlingStart;
     int m_flingModifier;
     bool m_flingSourceDevice;
-    OwnPtr<LinkHighlight> m_linkHighlight;
+    Vector<OwnPtr<LinkHighlight> > m_linkHighlights;
     OwnPtr<ValidationMessageClientImpl> m_validationMessage;
     OwnPtr<FullscreenController> m_fullscreenController;
 
     bool m_showFPSCounter;
     bool m_showPaintRects;
     bool m_showDebugBorders;
     bool m_continuousPaintingEnabled;
     bool m_showScrollBottleneckRects;
     WebColor m_baseBackgroundColor;
 
     WebCore::Timer<WebViewImpl> m_helperPluginCloseTimer;
     Vector<RefPtr<WebHelperPluginImpl> > m_helperPluginsPendingClose;
 };
 
 inline WebViewImpl* toWebViewImpl(WebView* webView)
 {
     // We have no ways to check if the specified WebView is an instance of
     // WebViewImpl because WebViewImpl is the only implementation of WebView.
     return static_cast<WebViewImpl*>(webView);
 }
 
 } // namespace WebKit
 
 #endif