Revert of RTCOutboundRTPStreamStats added.

webrtc/api/stats/rtcstats.h

 /*
  *  Copyright 2016 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.
  */
 
@@ skipping 53 matching lines @@
   virtual const char* type() const = 0;
   // Returns a vector of pointers to all the |RTCStatsMemberInterface| members
   // of this class. This allows for iteration of members. For a given class,
   // |Members| always returns the same members in the same order.
   std::vector<const RTCStatsMemberInterface*> Members() const;
   // Checks if the two stats objects are of the same type and have the same
   // member values. These operators are exposed for testing.
   bool operator==(const RTCStats& other) const;
   bool operator!=(const RTCStats& other) const;
 
-  // Creates a human readable string representation of the stats object, listing
-  // all of its members (names and values).
+  // Creates a human readable string representation of the report, listing all
+  // of its members (names and values).
   std::string ToString() const;
 
   // Downcasts the stats object to an |RTCStats| subclass |T|. DCHECKs that the
   // object is of type |T|.
   template<typename T>
   const T& cast_to() const {
     RTC_DCHECK_EQ(type(), T::kType);
     return static_cast<const T&>(*this);
   }
 
@@ skipping 227 matching lines @@
     return &value_;
   }
 
  private:
   T value_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_STATS_RTCSTATS_H_