Replace usage of WebVector::isEmpty with WebVector::empty().

content/renderer/media/peer_connection_tracker.cc

 // Copyright (c) 2013 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.
 
 #include "content/renderer/media/peer_connection_tracker.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 76 matching lines @@
     const blink::WebMediaStreamTrack& component) {
   return component.source().id().utf8();
 }
 
 static std::string SerializeMediaDescriptor(
     const blink::WebMediaStream& stream) {
   std::string id = stream.id().utf8();
   std::string result = "id: " + id;
   blink::WebVector<blink::WebMediaStreamTrack> tracks;
   stream.audioTracks(tracks);
-  if (!tracks.isEmpty()) {
+  if (!tracks.empty()) {
     result += ", audio: [";
     for (size_t i = 0; i < tracks.size(); ++i) {
       result += SerializeMediaStreamComponent(tracks[i]);
       if (i != tracks.size() - 1)
         result += ", ";
     }
     result += "]";
   }
   stream.videoTracks(tracks);
-  if (!tracks.isEmpty()) {
+  if (!tracks.empty()) {
     result += ", video: [";
     for (size_t i = 0; i < tracks.size(); ++i) {
       result += SerializeMediaStreamComponent(tracks[i]);
       if (i != tracks.size() - 1)
         result += ", ";
     }
     result += "]";
   }
   return result;
 }
@@ skipping 623 matching lines @@
   DCHECK(main_thread_.CalledOnValidThread());
   SendTarget()->Send(new PeerConnectionTrackerHost_UpdatePeerConnection(
       local_id, std::string(callback_type), value));
 }
 
 void PeerConnectionTracker::OverrideSendTargetForTesting(RenderThread* target) {
   send_target_for_test_ = target;
 }
 
 }  // namespace content