Added an empty() method to rtc::Buffer

webrtc/base/buffer.h

 /*
  *  Copyright 2004 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 106 matching lines @@
   }
 
   template <typename U = T,
             typename std::enable_if<
                 internal::BufferCompat<T, U>::value>::type* = nullptr>
   U* data() {
     RTC_DCHECK(IsConsistent());
     return reinterpret_cast<U*>(data_.get());
   }
 
+  bool empty() const {
+    RTC_DCHECK(IsConsistent());
+    return size_ == 0;
+  }
+
   size_t size() const {
     RTC_DCHECK(IsConsistent());
     return size_;
   }
 
   size_t capacity() const {
     RTC_DCHECK(IsConsistent());
     return capacity_;
   }
 
@@ skipping 212 matching lines @@
   size_t capacity_;
   std::unique_ptr<T[]> data_;
 };
 
 // By far the most common sort of buffer.
 using Buffer = BufferT<uint8_t>;
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_BUFFER_H_