Update API for Objective-C RTCStats.

webrtc/api/objc/RTCStats+Private.h

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#import <Foundation/Foundation.h>
+#import "RTCStats.h"
 
-#include <string>
+#include "talk/app/webrtc/statstypes.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
-@interface NSString (StdString)
+@interface RTCStats ()
 
-@property(nonatomic, readonly) std::string stdString;
-
-+ (std::string)stdStringForString:(NSString *)nsString;
-+ (NSString *)stringForStdString:(const std::string&)stdString;
+/**
+ * Initialize an RTCStats object from a native StatsReport. No
+ * ownership is taken of the native stats report.

[tkchin_webrtc, 2015/12/21 12:57:13]

nit: don't need ownership comment, since it's pass by reference

[hjon, 2015/12/21 22:02:52]

Done.

+ */
+- (instancetype)initWithStatsReport:(const webrtc::StatsReport &)statsReport;
 
 @end
 
 NS_ASSUME_NONNULL_END