Migrate WTF::Vector::append() to ::push_back() [part 14 of N]

third_party/WebKit/Source/platform/exported/WebMediaStream.cpp

Index: third_party/WebKit/Source/platform/exported/WebMediaStream.cpp
diff --git a/third_party/WebKit/Source/platform/exported/WebMediaStream.cpp b/third_party/WebKit/Source/platform/exported/WebMediaStream.cpp
index 932a778b914854700c1df0eb9eef95450d5241e2..42f9cbca1e285e6dd0156bc87114255ff50367da 100644
--- a/third_party/WebKit/Source/platform/exported/WebMediaStream.cpp
+++ b/third_party/WebKit/Source/platform/exported/WebMediaStream.cpp
@@ -126,11 +126,11 @@ void WebMediaStream::initialize(
   MediaStreamComponentVector audio, video;
   for (size_t i = 0; i < audioTracks.size(); ++i) {
     MediaStreamComponent* component = audioTracks[i];
-    audio.append(component);
+    audio.push_back(component);
   }
   for (size_t i = 0; i < videoTracks.size(); ++i) {
     MediaStreamComponent* component = videoTracks[i];
-    video.append(component);
+    video.push_back(component);
   }
   m_private = MediaStreamDescriptor::create(label, audio, video);
 }