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

third_party/WebKit/public/platform/WebInputEvent.h

Index: third_party/WebKit/public/platform/WebInputEvent.h
diff --git a/third_party/WebKit/public/platform/WebInputEvent.h b/third_party/WebKit/public/platform/WebInputEvent.h
index e26e7525929590b5e32515707b3a01443728d931..818888de8a2b0144e3188111c24ae97b0bf546f7 100644
--- a/third_party/WebKit/public/platform/WebInputEvent.h
+++ b/third_party/WebKit/public/platform/WebInputEvent.h
@@ -187,6 +187,10 @@ public:
         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