Expand tap highlight to allow multiple highlights for touch disambiguation.

Source/WebKit/chromium/src/WebViewImpl.h

Index: Source/WebKit/chromium/src/WebViewImpl.h
diff --git a/Source/WebKit/chromium/src/WebViewImpl.h b/Source/WebKit/chromium/src/WebViewImpl.h
index 2c8b37643916a43dd36d3f48b2f8c57dcc7858c8..a4ca869f0145b33c403c3de14636a5efb68ff291 100644
--- a/Source/WebKit/chromium/src/WebViewImpl.h
+++ b/Source/WebKit/chromium/src/WebViewImpl.h
@@ -539,7 +539,8 @@ public:
 
     void computeScaleAndScrollForHitRect(const WebRect& hitRect, AutoZoomType, float& scale, WebPoint& scroll, bool& isAnchor);
     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 animateZoomAroundPoint(const WebCore::IntPoint&, AutoZoomType);
 
@@ -570,7 +571,7 @@ public:
     bool shouldDisableDesktopWorkarounds();
 
     // Exposed for tests.
-    LinkHighlight* linkHighlight() { return m_linkHighlight.get(); }
+    LinkHighlight* linkHighlight(int i) { return m_linkHighlights[i].get(); }
 
     WebSettingsImpl* settingsImpl();
 
@@ -832,7 +833,7 @@ private:
     WebPoint m_globalPositionOnFlingStart;
     int m_flingModifier;
     bool m_flingSourceDevice;
-    OwnPtr<LinkHighlight> m_linkHighlight;
+    Vector<OwnPtr<LinkHighlight> > m_linkHighlights;
     OwnPtr<ValidationMessageClientImpl> m_validationMessage;
 
     bool m_showFPSCounter;