Added experimental tilt and tiltDirection to the Touch interface

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 5109 matching lines @@
     m_scriptedAnimationController->cancelCallback(id);
 }
 
 void Document::serviceScriptedAnimations(double monotonicAnimationStartTime)
 {
     if (!m_scriptedAnimationController)
         return;
     m_scriptedAnimationController->serviceScriptedAnimations(monotonicAnimationStartTime);
 }
 
-PassRefPtrWillBeRawPtr<Touch> Document::createTouch(DOMWindow* window, EventTarget* target, int identifier, double pageX, double pageY, double screenX, double screenY, double radiusX, double radiusY, float rotationAngle, float force) const
+PassRefPtrWillBeRawPtr<Touch> Document::createTouch(DOMWindow* window, EventTarget* target, int identifier, double pageX, double pageY, double screenX, double screenY, double radiusX, double radiusY, float rotationAngle, float force, float tilt, float tiltDirection) const
 {
     // Match behavior from when these types were integers, and avoid surprises from someone explicitly
     // passing Infinity/NaN.
     if (!std::isfinite(pageX))
         pageX = 0;
     if (!std::isfinite(pageY))
         pageY = 0;
     if (!std::isfinite(screenX))
         screenX = 0;
     if (!std::isfinite(screenY))
         screenY = 0;
     if (!std::isfinite(radiusX))
         radiusX = 0;
     if (!std::isfinite(radiusY))
         radiusY = 0;
     if (!std::isfinite(rotationAngle))
         rotationAngle = 0;
     if (!std::isfinite(force))
         force = 0;
+    if (!std::isfinite(tilt))
+        tilt = 0;

[Rick Byers, 2015/02/13 08:48:05]

you wanted to preserve NaN, right?  This adjusting to 0 was just for
compatibility with when we use to take integer values.  You don't have that
problem.  But it could also be reasonable to prohibit Infinite and NaN values
(whatever your draft spec says on this is OK with me for now - these are details
we can leave to proper standardization).

[d.pikalov, 2015/02/13 13:31:17]

Right. I have new patchset, with NaN support (I'll upload this bit later today).

+    if (!std::isfinite(tiltDirection))
+        tiltDirection = 0;
 
     // FIXME: It's not clear from the documentation at
     // http://developer.apple.com/library/safari/#documentation/UserExperience/Reference/DocumentAdditionsReference/DocumentAdditions/DocumentAdditions.html
     // when this method should throw and nor is it by inspection of iOS behavior. It would be nice to verify any cases where it throws under iOS
     // and implement them here. See https://bugs.webkit.org/show_bug.cgi?id=47819
     LocalFrame* frame = window && window->isLocalDOMWindow() ? toLocalDOMWindow(window)->frame() : this->frame();
-    return Touch::create(frame, target, identifier, FloatPoint(screenX, screenY), FloatPoint(pageX, pageY), FloatSize(radiusX, radiusY), rotationAngle, force);
+    return Touch::create(frame, target, identifier, FloatPoint(screenX, screenY), FloatPoint(pageX, pageY), FloatSize(radiusX, radiusY), rotationAngle, force, tilt, tiltDirection);
 }
 
 PassRefPtrWillBeRawPtr<TouchList> Document::createTouchList(WillBeHeapVector<RefPtrWillBeMember<Touch>>& touches) const
 {
     return TouchList::adopt(touches);
 }
 
 DocumentLoader* Document::loader() const
 {
     if (!m_frame)
@@ skipping 606 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif