Increase WebTouchEvent::touchesLengthCap to 16.

public/web/WebInputEvent.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 467 matching lines @@
         memset(&data, 0, sizeof(data));
     }
 };
 
 // WebTouchEvent --------------------------------------------------------------
 
 class WebTouchEvent : public WebInputEvent {
 public:
     // Maximum number of simultaneous touches supported on
     // Ash/Aura.
-    enum { touchesLengthCap = 12 };
+    enum { touchesLengthCap = 16 };
 
     unsigned touchesLength;
     // List of all touches, regardless of state.
     WebTouchPoint touches[touchesLengthCap];
 
     // Whether the event can be canceled (with preventDefault). If true then the browser
     // must wait for an ACK for this event. If false then no ACK IPC is expected.
     // See comment at the top for why an int is used here instead of a bool.
     int cancelable;
 
     WebTouchEvent()
         : WebInputEvent(sizeof(WebTouchEvent))
         , touchesLength(0)
         , cancelable(true)
     {
     }
 };
 
 #pragma pack(pop)
 
 } // namespace blink
 
 #endif