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

third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp

Index: third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp
diff --git a/third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp b/third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp
index 8df5689eb0482d03d3599dc3b3fbcae8b9d55e1b..32b8b166904655dfb8981ce960572199655bba76 100644
--- a/third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp
+++ b/third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp
@@ -226,7 +226,7 @@ bool MHTMLParser::parseArchiveWithHeader(
         parseNextPart(*header, String(), String(), endOfArchiveReached);
     if (!resource)
       return false;
-    resources.append(resource);
+    resources.push_back(resource);
     return true;
   }
 
@@ -258,7 +258,7 @@ bool MHTMLParser::parseArchiveWithHeader(
       DVLOG(1) << "Failed to parse MHTML part.";
       return false;
     }
-    resources.append(resource);
+    resources.push_back(resource);
   }
   return true;
 }