[Content] Allow V8ValueConverter to convert -0 to an integer

content/public/child/v8_value_converter.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_CHILD_V8_VALUE_CONVERTER_H_
 #define CONTENT_PUBLIC_CHILD_V8_VALUE_CONVERTER_H_
 
 #include <memory>
 
 #include "base/callback.h"
@@ skipping 82 matching lines @@
   // If true, Function objects are converted into DictionaryValues with whatever
   // additional properties has been set on them.
   //
   // Otherwise they are treated as unsupported, see FromV8Value.
   virtual void SetFunctionAllowed(bool val) = 0;
 
   // If true, null values are stripped from objects. This is often useful when
   // converting arguments to extension APIs.
   virtual void SetStripNullFromObjects(bool val) = 0;
 
+  // If true, treats -0 as an integer. Otherwise, -0 is converted to a double.
+  virtual void SetConvertNegativeZeroToInt(bool val) = 0;
+
   // Extend default behavior of V8ValueConverter.
   virtual void SetStrategy(Strategy* strategy) = 0;
 
   // Converts a base::Value to a v8::Value.
   //
   // Unsupported types are replaced with null.  If an array or object throws
   // while setting a value, that property or item is skipped, leaving a hole in
   // the case of arrays.
   // TODO(dcheng): This should just take a const reference.
   virtual v8::Local<v8::Value> ToV8Value(
@@ skipping 10 matching lines @@
   // converted, whereas if an array throws while converting an item it will be
   // converted to Value(Type::NONE).
   virtual std::unique_ptr<base::Value> FromV8Value(
       v8::Local<v8::Value> value,
       v8::Local<v8::Context> context) const = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_CHILD_V8_VALUE_CONVERTER_H_