Send early ShowPress on TapDown when page isn't scrollable/pinchable.

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index ebc75115e5f198aaa7ed25cdf679f102931bcd92..b1ec7a90b2f8685c655b622f885a6dc1de785f2b 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -1107,7 +1107,11 @@ Node* WebViewImpl::bestTapNode(const PlatformGestureEvent& tapEvent)
     m_page->mainFrame()->eventHandler().adjustGesturePosition(tapEvent, touchEventLocation);
 
     IntPoint hitTestPoint = m_page->mainFrame()->view()->windowToContents(touchEventLocation);
-    HitTestResult result = m_page->mainFrame()->eventHandler().hitTestResultAtPoint(hitTestPoint, HitTestRequest::TouchEvent | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent);
+    EventHandler& eventHandler = m_page->mainFrame()->eventHandler();
+    HitTestRequest::HitTestRequestType hitType = HitTestRequest::TouchEvent | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent;
+    if (eventHandler.tapDownTriggeredActive())
+        hitType |= HitTestRequest::ReadOnly;

[Rick Byers, 2014/02/14 21:27:53]

Does this normally need to be non-readonly so that active gets triggered for the
disambiguation pop-up?  I had assumed showPress would trigger it in that case
too (or if there's a race, perhaps we should be sending a show press explicitly
before showing the disambiguation window).

Why do you need to make it read only in this case?

+    HitTestResult result = eventHandler.hitTestResultAtPoint(hitTestPoint, hitType);
     bestTouchNode = result.targetNode();
 
     // We might hit something like an image map that has no renderer on it