Remove unused constants from SerializedScriptValue.h.

third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h

Index: third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h b/third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h
index 2317349b8a006cfadb5d890e5af3578bdc8ee599..fd55ed11e479271bd23f6e1a21e148ba2d7704fd 100644
--- a/third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h
+++ b/third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h
@@ -73,10 +73,6 @@ class CORE_EXPORT SerializedScriptValue
   // Version 9: Added Map and Set support.
   static const uint32_t wireFormatVersion = 9;
 
-  // VarInt encoding constants.
-  static const int varIntShift = 7;
-  static const int varIntMask = (1 << varIntShift) - 1;
-
   struct SerializeOptions {
     STACK_ALLOCATED();
     Transferables* transferables = nullptr;