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..8bf0e2d607197eb550d65271c39365d38aa297cc 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
@@ -34,167 +34,134 @@ Received pointerout, pointerId=3
 Received pointerleave, pointerId=3
 Received touchend, touchIds=0
 
--- preventDefault on touchmove, without uncanceledMoveCausesScroll --
+-- preventDefault on none, with notifyStartOfTouchScroll --
 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 touchmove, touchIds=0
+Received pointercancel, pointerId=4
 Received pointerout, pointerId=4
 Received pointerleave, pointerId=4
+Received touchmove, touchIds=0
+Received touchmove, touchIds=0
 Received touchend, touchIds=0
 
--- preventDefault on none, with uncanceledMoveCausesScroll --
+-- preventDefault on pointermove, with notifyStartOfTouchScroll --
 Received pointerover, pointerId=5
 Received pointerenter, pointerId=5
 Received pointerdown, pointerId=5
 Received touchstart, touchIds=0
-Received pointermove, pointerId=5
-Received touchmove, touchIds=0
-Received pointermove, pointerId=5
-Received touchmove, touchIds=0
+Received pointermove, pointerId=5, prevented default
 Received pointercancel, pointerId=5
 Received pointerout, pointerId=5
 Received pointerleave, pointerId=5
 Received touchmove, touchIds=0
+Received touchmove, touchIds=0
 Received touchend, touchIds=0
 
--- preventDefault on pointermove, with uncanceledMoveCausesScroll --
+--- multi drag tests ---
+
+-- preventDefault on none, without notifyStartOfTouchScroll --
 Received pointerover, pointerId=6
 Received pointerenter, pointerId=6
 Received pointerdown, pointerId=6
-Received touchstart, touchIds=0
-Received pointermove, pointerId=6, prevented default
-Received pointermove, pointerId=6, prevented default
-Received pointercancel, pointerId=6
-Received pointerout, pointerId=6
-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 --
 Received pointerover, pointerId=8
 Received pointerenter, pointerId=8
 Received pointerdown, pointerId=8
-Received pointerover, pointerId=9
-Received pointerenter, pointerId=9
-Received pointerdown, pointerId=9
-Received pointerover, pointerId=10
-Received pointerenter, pointerId=10
-Received pointerdown, pointerId=10
 Received touchstart, touchIds=012
+Received pointermove, pointerId=6
+Received pointermove, pointerId=7
 Received pointermove, pointerId=8
-Received pointermove, pointerId=9
-Received pointermove, pointerId=10
 Received touchmove, touchIds=012
+Received pointermove, pointerId=6
+Received pointermove, pointerId=7
 Received pointermove, pointerId=8
-Received pointermove, pointerId=9
-Received pointermove, pointerId=10
 Received touchmove, touchIds=012
-Received pointerover, pointerId=11
-Received pointerenter, pointerId=11
-Received pointerdown, pointerId=11
+Received pointerover, pointerId=9
+Received pointerenter, pointerId=9
+Received pointerdown, pointerId=9
 Received touchstart, touchIds=3
+Received pointermove, pointerId=6
+Received pointermove, pointerId=7
 Received pointermove, pointerId=8
 Received pointermove, pointerId=9
-Received pointermove, pointerId=10
-Received pointermove, pointerId=11
 Received touchmove, touchIds=0123
+Received pointerup, pointerId=6
+Received pointerout, pointerId=6
+Received pointerleave, pointerId=6
+Received pointerup, pointerId=7
+Received pointerout, pointerId=7
+Received pointerleave, pointerId=7
 Received pointerup, pointerId=8
 Received pointerout, pointerId=8
 Received pointerleave, pointerId=8
 Received pointerup, pointerId=9
 Received pointerout, pointerId=9
 Received pointerleave, pointerId=9
-Received pointerup, pointerId=10
-Received pointerout, pointerId=10
-Received pointerleave, pointerId=10
-Received pointerup, pointerId=11
-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=10
+Received pointerenter, pointerId=10
+Received pointerdown, pointerId=10
+Received pointerover, pointerId=11
+Received pointerenter, pointerId=11
+Received pointerdown, pointerId=11
 Received pointerover, pointerId=12
 Received pointerenter, pointerId=12
 Received pointerdown, pointerId=12
-Received pointerover, pointerId=13
-Received pointerenter, pointerId=13
-Received pointerdown, pointerId=13
-Received pointerover, pointerId=14
-Received pointerenter, pointerId=14
-Received pointerdown, pointerId=14
 Received touchstart, touchIds=012
+Received pointermove, pointerId=10
+Received pointermove, pointerId=11
 Received pointermove, pointerId=12
-Received pointermove, pointerId=13
-Received pointermove, pointerId=14
 Received touchmove, touchIds=012
+Received pointermove, pointerId=10
+Received pointermove, pointerId=11
 Received pointermove, pointerId=12
-Received pointermove, pointerId=13
-Received pointermove, pointerId=14
 Received touchmove, touchIds=012
+Received pointercancel, pointerId=10
+Received pointerout, pointerId=10
+Received pointerleave, pointerId=10
+Received pointercancel, pointerId=11
+Received pointerout, pointerId=11
+Received pointerleave, pointerId=11
 Received pointercancel, pointerId=12
 Received pointerout, pointerId=12
 Received pointerleave, pointerId=12
-Received pointercancel, pointerId=13
-Received pointerout, pointerId=13
-Received pointerleave, pointerId=13
-Received pointercancel, pointerId=14
-Received pointerout, pointerId=14
-Received pointerleave, pointerId=14
 Received touchstart, touchIds=3
 Received touchmove, touchIds=0123
 Received touchend, touchIds=0123
 
 --- multi cancel tests ---
 
+Received pointerover, pointerId=13
+Received pointerenter, pointerId=13
+Received pointerdown, pointerId=13
+Received pointerover, pointerId=14
+Received pointerenter, pointerId=14
+Received pointerdown, pointerId=14
 Received pointerover, pointerId=15
 Received pointerenter, pointerId=15
 Received pointerdown, pointerId=15
-Received pointerover, pointerId=16
-Received pointerenter, pointerId=16
-Received pointerdown, pointerId=16
-Received pointerover, pointerId=17
-Received pointerenter, pointerId=17
-Received pointerdown, pointerId=17
 Received touchstart, touchIds=012
-Received pointercancel, pointerId=17
-Received pointerout, pointerId=17
-Received pointerleave, pointerId=17
-Received touchcancel, touchIds=2
-Received pointermove, pointerId=15
-Received pointermove, pointerId=16
-Received touchmove, touchIds=01
 Received pointercancel, pointerId=15
 Received pointerout, pointerId=15
 Received pointerleave, pointerId=15
-Received pointercancel, pointerId=16
-Received pointerout, pointerId=16
-Received pointerleave, pointerId=16
+Received touchcancel, touchIds=2
+Received pointermove, pointerId=13
+Received pointermove, pointerId=14
+Received touchmove, touchIds=01
+Received pointercancel, pointerId=13
+Received pointerout, pointerId=13
+Received pointerleave, pointerId=13
+Received pointercancel, pointerId=14
+Received pointerout, pointerId=14
+Received pointerleave, pointerId=14
 Received touchcancel, touchIds=01
 
 PASS successfullyParsed is true