Consuming a touch move prevents only the next scroll update.

content/browser/renderer_host/input/gesture_event_packet.cc

Index: content/browser/renderer_host/input/gesture_event_packet.cc
diff --git a/content/browser/renderer_host/input/gesture_event_packet.cc b/content/browser/renderer_host/input/gesture_event_packet.cc
index d0fe17219b9e2ecba7b69d2ed15c5dece4ffba50..5b959531078e5a2121dc69f75081a67169f30ece 100644
--- a/content/browser/renderer_host/input/gesture_event_packet.cc
+++ b/content/browser/renderer_host/input/gesture_event_packet.cc
@@ -14,22 +14,25 @@ using blink::WebTouchPoint;
 namespace content {
 namespace {
 
-bool IsTouchSequenceStart(const WebTouchEvent& event) {
-  if (event.type != WebInputEvent::TouchStart)
-    return false;
-  if (!event.touchesLength)
-    return false;
-  for (size_t i = 0; i < event.touchesLength; i++) {
-    if (event.touches[i].state != WebTouchPoint::StatePressed)
-      return false;
-  }
-  return true;
-}
-
 GestureEventPacket::GestureSource
 ToGestureSource(const WebTouchEvent& event) {
-  return IsTouchSequenceStart(event) ? GestureEventPacket::TOUCH_BEGIN
-                                     : GestureEventPacket::TOUCH;
+  switch(event.type) {
+    case WebInputEvent::TouchStart:
+      if (!event.touchesLength)
+        return GestureEventPacket::INVALID;
+      for (size_t i = 0; i < event.touchesLength; i++) {
+        if (event.touches[i].state != WebTouchPoint::StatePressed)
+          return GestureEventPacket::TOUCH_BEGIN;
+      }
+      return GestureEventPacket::TOUCH_SEQUENCE_BEGIN;
+    case WebInputEvent::TouchMove:
+      return GestureEventPacket::TOUCH_MOVE;
+    case WebInputEvent::TouchEnd:
+    case WebInputEvent::TouchCancel:
+      return GestureEventPacket::TOUCH_END;
+    default:
+      return GestureEventPacket::INVALID;
+  }
 }
 
 }  // namespace