Tweaks layoutTests to use eventSender.setTouchPointRadius correctly

LayoutTests/fast/events/touch/script-tests/basic-single-touch-events.js

 var div = document.createElement("div");
 div.id = "touchtarget";
 div.style.width = "100px";
 div.style.height = "100px";
 div.style.backgroundColor = "blue";
 
 var lastEvent = null;
 var touchEventsReceived = 0;
 var EXPECTED_TOUCH_EVENTS_TOTAL = 5;
 
@@ skipping 74 matching lines @@
             verifyTouchEvent("touchmove", 1, 1, 1);
             shouldBeEqualToString("lastEvent.touches[0].target.tagName", "DIV");
         break;
 
         default: testFailed("Wrong number of touch events! (" + which + ")");
     }
 }
 
 function singleTouchSequence()
 {
-    if (eventSender.setTouchPointRadius)
-        eventSender.setTouchPointRadius(10,10);
-    eventSender.addTouchPoint(10, 10);
+    eventSender.addTouchPoint(10, 10, 10, 10);

[Rick Byers, 2015/03/12 14:24:40]

If we've got setTouchPointRadius, then let's just use that instead of allowing
radius to be supplied via addTouchPoint.  You just need to call
setTouchPointRadius after calling addTouchPoint but before calling touchStart.

All I'm aiming for here is a single pattern for setting the extended properties
like radius and tilt...

[d.pikalov, 2015/03/16 16:48:44]

There is problem - setTouchPointRadius() sets event's state to StateMoved,
calling this method before eventSender.touchStart() causes StateMoved before
StatePressed - as a result I get 'unexpected timeout'. I going to add one more
parameter (bool set_state_moved) to setTouchPointRadius()

Btw, I guess there are no reasons to keep eventSender.setTouchPointRadius under
"if", right ?

[Rick Byers, 2015/03/16 18:43:17]

Ah, sorry I didn't appreciate that this was more complex.  I was thinking it was
trivial.  What you've done seems fine.
Right, I'd like to get rid of it (it adds uncertainty for the reader of the
test).  But there's a staging problem - you can't (at least for a few more
weeks) land chromium and blink changes atomically.  So you probably need to land
this CL first, then lend the change to event_sender, then submit a 3rd CL to
remove the 'if(eventSender.setTouchPointRadius)' checks.

     eventSender.touchStart();
 
     if (eventSender.setTouchPointRadius)
-        eventSender.setTouchPointRadius(12,12);
+        eventSender.setTouchPointRadius(0,12,12);
     eventSender.updateTouchPoint(0, 50, 50);
     eventSender.setTouchModifier("shift", true);
     eventSender.setTouchModifier("alt", true);
     eventSender.touchMove();
 
     eventSender.setTouchModifier("shift", false);
     eventSender.setTouchModifier("alt", false);
 
     eventSender.releaseTouchPoint(0);
     eventSender.touchEnd();
@@ skipping 20 matching lines @@
 
     lastEvent = null;
     eventSender.clearTouchPoints();
     touchTargets();
 
 } else {
     debug("This test requires DumpRenderTree.  Tap on the blue rect to log.")
 }