Notify Blink about start of gesture scroll through a queued event.

third_party/WebKit/LayoutTests/virtual/pointerevent/fast/events/pointerevents/touch-pointercancel-expected.txt

Index: third_party/WebKit/LayoutTests/virtual/pointerevent/fast/events/pointerevents/touch-pointercancel-expected.txt
diff --git a/third_party/WebKit/LayoutTests/virtual/pointerevent/fast/events/pointerevents/touch-pointercancel-expected.txt b/third_party/WebKit/LayoutTests/virtual/pointerevent/fast/events/pointerevents/touch-pointercancel-expected.txt
index 635f01909e033aa1d42e3179487ef306cc6bb97a..052de6edc619a1bcfbdd4cdff6c3287423eb6a89 100644
--- a/third_party/WebKit/LayoutTests/virtual/pointerevent/fast/events/pointerevents/touch-pointercancel-expected.txt
+++ b/third_party/WebKit/LayoutTests/virtual/pointerevent/fast/events/pointerevents/touch-pointercancel-expected.txt
@@ -5,7 +5,7 @@ On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE
 
 --- single drag tests ---
 
--- preventDefault on none, without uncanceledMoveCausesScroll --
+-- preventDefault on none, without notifyStartOfTOuchScroll --
 Received pointerover, pointerId=2
 Received pointerenter, pointerId=2
 Received pointerdown, pointerId=2
@@ -21,7 +21,7 @@ Received pointerout, pointerId=2
 Received pointerleave, pointerId=2
 Received touchend, touchIds=0
 
--- preventDefault on pointermove, without uncanceledMoveCausesScroll --
+-- preventDefault on pointermove, without notifyStartOfTOuchScroll --
 Received pointerover, pointerId=3
 Received pointerenter, pointerId=3
 Received pointerdown, pointerId=3
@@ -34,23 +34,7 @@ Received pointerout, pointerId=3
 Received pointerleave, pointerId=3
 Received touchend, touchIds=0
 
--- preventDefault on touchmove, without uncanceledMoveCausesScroll --
-Received pointerover, pointerId=4
-Received pointerenter, pointerId=4
-Received pointerdown, pointerId=4
-Received touchstart, touchIds=0
-Received pointermove, pointerId=4
-Received touchmove, touchIds=0, prevented default
-Received pointermove, pointerId=4
-Received touchmove, touchIds=0, prevented default
-Received pointermove, pointerId=4
-Received touchmove, touchIds=0, prevented default
-Received pointerup, pointerId=4
-Received pointerout, pointerId=4
-Received pointerleave, pointerId=4
-Received touchend, touchIds=0
-
--- preventDefault on none, with uncanceledMoveCausesScroll --
+-- preventDefault on none, with notifyStartOfTOuchScroll --
 Received pointerover, pointerId=5
 Received pointerenter, pointerId=5
 Received pointerdown, pointerId=5
@@ -65,7 +49,7 @@ Received pointerleave, pointerId=5
 Received touchmove, touchIds=0
 Received touchend, touchIds=0
 
--- preventDefault on pointermove, with uncanceledMoveCausesScroll --
+-- preventDefault on pointermove, with notifyStartOfTOuchScroll --
 Received pointerover, pointerId=6
 Received pointerenter, pointerId=6
 Received pointerdown, pointerId=6
@@ -78,25 +62,9 @@ Received pointerleave, pointerId=6
 Received touchmove, touchIds=0
 Received touchend, touchIds=0
 
--- preventDefault on touchmove, with uncanceledMoveCausesScroll --
-Received pointerover, pointerId=7
-Received pointerenter, pointerId=7
-Received pointerdown, pointerId=7
-Received touchstart, touchIds=0
-Received pointermove, pointerId=7
-Received touchmove, touchIds=0, prevented default
-Received pointermove, pointerId=7
-Received touchmove, touchIds=0, prevented default
-Received pointermove, pointerId=7
-Received touchmove, touchIds=0, prevented default
-Received pointerup, pointerId=7
-Received pointerout, pointerId=7
-Received pointerleave, pointerId=7
-Received touchend, touchIds=0
-
 --- multi drag tests ---
 
--- preventDefault on none, without uncanceledMoveCausesScroll --
+-- preventDefault on none, without notifyStartOfTOuchScroll --
 Received pointerover, pointerId=8
 Received pointerenter, pointerId=8
 Received pointerdown, pointerId=8
@@ -138,7 +106,7 @@ Received pointerout, pointerId=11
 Received pointerleave, pointerId=11
 Received touchend, touchIds=0123
 
--- preventDefault on none, with uncanceledMoveCausesScroll --
+-- preventDefault on none, with notifyStartOfTOuchScroll --
 Received pointerover, pointerId=12
 Received pointerenter, pointerId=12
 Received pointerdown, pointerId=12