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

third_party/WebKit/Source/platform/audio/ReverbConvolver.cpp

Index: third_party/WebKit/Source/platform/audio/ReverbConvolver.cpp
diff --git a/third_party/WebKit/Source/platform/audio/ReverbConvolver.cpp b/third_party/WebKit/Source/platform/audio/ReverbConvolver.cpp
index 2601f6aa84f21e4cf2459b6c6014c8b72cf4fd86..5fc9f25d48f1a9354e5d6ac0a4c0ed1ae29ff237 100644
--- a/third_party/WebKit/Source/platform/audio/ReverbConvolver.cpp
+++ b/third_party/WebKit/Source/platform/audio/ReverbConvolver.cpp
@@ -112,10 +112,10 @@ ReverbConvolver::ReverbConvolver(AudioChannel* impulseResponse,
     bool isBackgroundStage = false;
 
     if (useBackgroundThreads && stageOffset > RealtimeFrameLimit) {
-      m_backgroundStages.append(std::move(stage));
+      m_backgroundStages.push_back(std::move(stage));
       isBackgroundStage = true;
     } else {
-      m_stages.append(std::move(stage));
+      m_stages.push_back(std::move(stage));
     }
 
     stageOffset += stageSize;