Migrate WTF::Vector::append() to ::push_back() [part 15 of N]

third_party/WebKit/Source/web/WebSearchableFormData.cpp

Index: third_party/WebKit/Source/web/WebSearchableFormData.cpp
diff --git a/third_party/WebKit/Source/web/WebSearchableFormData.cpp b/third_party/WebKit/Source/web/WebSearchableFormData.cpp
index 9c440b365be491e47ccecd107be1bd0bd5941ec8..1cee88d8982bbb3d3a0af891bd1166a89f110cb6 100644
--- a/third_party/WebKit/Source/web/WebSearchableFormData.cpp
+++ b/third_party/WebKit/Source/web/WebSearchableFormData.cpp
@@ -197,10 +197,10 @@ bool buildSearchString(const HTMLFormElement& form,
 
     for (const auto& entry : formData->entries()) {
       if (!encodedString->isEmpty())
-        encodedString->append('&');
+        encodedString->push_back('&');
       FormDataEncoder::encodeStringAsFormData(*encodedString, entry->name(),
                                               FormDataEncoder::NormalizeCRLF);
-      encodedString->append('=');
+      encodedString->push_back('=');
       if (&control == textElement) {
         encodedString->append("{searchTerms}", 13);
         isElementFound = true;