Migrate WTF::Vector::append() to ::push_back() [part 4 of N]

third_party/WebKit/Source/core/dom/CSSSelectorWatchTest.cpp

 // Copyright 2016 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 "core/dom/CSSSelectorWatch.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/StyleEngine.h"
 #include "core/frame/FrameView.h"
 #include "core/html/HTMLElement.h"
@@ skipping 35 matching lines @@
   document().body()->setInnerHTML(
       "<div>"
       "  <span id='x' class='a'></span>"
       "  <span id='y' class='b'><span></span></span>"
       "  <span id='z'><span></span></span>"
       "</div>");
 
   CSSSelectorWatch& watch = CSSSelectorWatch::from(document());
 
   Vector<String> selectors;
-  selectors.append(".a");
+  selectors.push_back(".a");
   watch.watchCSSSelectors(selectors);
 
   document().view()->updateAllLifecyclePhases();
 
   selectors.clear();
-  selectors.append(".b");
-  selectors.append(".c");
-  selectors.append("#nomatch");
+  selectors.push_back(".b");
+  selectors.push_back(".c");
+  selectors.push_back("#nomatch");
   watch.watchCSSSelectors(selectors);
 
   document().view()->updateAllLifecyclePhases();
 
   Element* x = document().getElementById("x");
   Element* y = document().getElementById("y");
   Element* z = document().getElementById("z");
   ASSERT_TRUE(x);
   ASSERT_TRUE(y);
   ASSERT_TRUE(z);
@@ skipping 11 matching lines @@
   EXPECT_EQ(2u, afterCount - beforeCount);
 
   EXPECT_EQ(1u, addedSelectors(watch).size());
   EXPECT_TRUE(addedSelectors(watch).contains(".c"));
 
   EXPECT_EQ(1u, removedSelectors(watch).size());
   EXPECT_TRUE(removedSelectors(watch).contains(".b"));
 }
 
 }  // namespace blink