Migrate WTF::Vector::append() to ::push_back() in WTF::HexNumber

third_party/WebKit/Source/wtf/HexNumber.h

Index: third_party/WebKit/Source/wtf/HexNumber.h
diff --git a/third_party/WebKit/Source/wtf/HexNumber.h b/third_party/WebKit/Source/wtf/HexNumber.h
index 6956430bfd413474530f8fe4fd4f764f3f09d2c4..47816f8b8af3ab2444da99953b6ac5c822f1a9af 100644
--- a/third_party/WebKit/Source/wtf/HexNumber.h
+++ b/third_party/WebKit/Source/wtf/HexNumber.h
@@ -45,6 +45,15 @@ inline void appendByteAsHex(unsigned char byte,
   destination.append(hexDigits[byte & 0xF]);
 }
 
+template <>
+inline void appendByteAsHex<Vector<LChar>>(unsigned char byte,
+                                           Vector<LChar>& destination,
+                                           HexConversionMode mode = Uppercase) {

[jsbell, 2017/01/12 23:35:26]

This should be just `HexConversionMode mode` (i.e. drop `= Uppercase`) -
apparently it inherits that from the specialized template definition. Builds
fine for me with that.

+  const LChar* hexDigits = Internal::hexDigitsForMode(mode);
+  destination.push_back(hexDigits[byte >> 4]);
+  destination.push_back(hexDigits[byte & 0xF]);
+}
+
 template <typename T>
 inline void appendUnsignedAsHex(unsigned number,
                                 T& destination,