Always reset touch action at the beginning of a new gesture sequence

content/common/input/web_input_event_traits.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/input/web_input_event_traits.h"
 
 #include <bitset>
 
 #include "base/logging.h"
 
@@ skipping 321 matching lines @@
     case WebInputEvent::MouseEnter:
     case WebInputEvent::MouseLeave:
     case WebInputEvent::ContextMenu:
       return true;
     default:
       break;
   }
   return false;
 }
 
+bool WebInputEventTraits::IsNewTouchSequence(const WebTouchEvent& event) {
+  if (event.type != WebInputEvent::TouchStart)
+    return false;
+  DCHECK(event.touchesLength);
+  if (!event.touchesLength)
+    return false;
+  for (size_t i = 0; i < event.touchesLength; i++) {
+    if (event.touches[i].state != blink::WebTouchPoint::StatePressed)
+      return false;
+  }
+  return true;
+}
+
 }  // namespace content