Eraser tool type plumbing from ui/events to web events and PPAPI.

third_party/WebKit/public/platform/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 169 matching lines @@
         // by accessibility code first before normal input event processing.
         IsTouchAccessibility = 1 << 13,
 
         IsComposing      = 1 << 14,
 
         AltGrKey         = 1 << 15,
         FnKey            = 1 << 16,
         SymbolKey        = 1 << 17,
 
         ScrollLockOn     = 1 << 18,
+
+        // Indicates that a stylys event is using an eraser tool instead of a
+        // pen tool. Used by PPAPI.
+        IsEraser         = 1 << 19

[mustaq, 2016/08/30 18:13:48]

Having both |IsEraser| and |PointerType::Eraser| looks redundant. May we have
only one of these?

     };
 
     // Indicates whether the browser needs to block on the ACK result for
     // this event, and if not why note (for metrics/diagnostics purposes).
     // These values are direct mappings of the values in PlatformEvent
     // so the values can be cast between the enumerations. static_asserts
     // checking this are in web/WebInputEventConversion.cpp.
     enum DispatchType {
         // Event can be canceled.
         Blocking,
@@ skipping 443 matching lines @@
         , uniqueTouchEventId(0)
     {
     }
 };
 
 #pragma pack(pop)
 
 } // namespace blink
 
 #endif