Lock element at start of gesture sequence.

LayoutTests/fast/events/touch/gesture/gesture-tap-active-state.html

Index: LayoutTests/fast/events/touch/gesture/gesture-tap-active-state.html
diff --git a/LayoutTests/fast/events/touch/gesture/gesture-tap-active-state.html b/LayoutTests/fast/events/touch/gesture/gesture-tap-active-state.html
index 63c2dbe99d726a9075f6fd5788cf37dcc3a4efd2..e66b4b39951872ea17d49711e44b089110f9370c 100644
--- a/LayoutTests/fast/events/touch/gesture/gesture-tap-active-state.html
+++ b/LayoutTests/fast/events/touch/gesture/gesture-tap-active-state.html
@@ -60,6 +60,15 @@ function runTests()
     debug("Verify active isn't initially set");
     shouldBeFalse("isBoxActive()");
 
+
+    debug("Verify element locked for gesture sequence");
+    debug("Box shouldn't be active after tapdown on it");
+    eventSender.gestureTapDown(50, 50);
+    shouldBeFalse("isBoxActive()");
+    debug("Box should be active after showpress outside it");
+    eventSender.gestureShowPress(400, 50);
+    shouldBeTrue("isBoxActive()");
+
     debug("Verify tapdown,tap sets and clears active");
     eventSender.gestureShowPress(50, 50);
     shouldBeTrue("isBoxActive()");