Check Swaps and MergeDictionary for base::Value

base/values.h

Index: base/values.h
diff --git a/base/values.h b/base/values.h
index a95786878b2eaaba6e76cf2e6b0ccd6a9dc811b7..a07d2f86804f01f52e6e85a71ac7a2242abaa845 100644
--- a/base/values.h
+++ b/base/values.h
@@ -191,8 +191,8 @@ class BASE_EXPORT Value {
   void InternalCopyFundamentalValue(const Value& that);
   void InternalCopyConstructFrom(const Value& that);
   void InternalMoveConstructFrom(Value&& that);
-  void InternalCopyAssignFrom(const Value& that);
-  void InternalMoveAssignFrom(Value&& that);
+  void InternalCopyAssignFromSameType(const Value& that);
+  void InternalMoveAssignFromSameType(Value&& that);
   void InternalCleanup();
 };