wtf: Implement StringView specialization of string concatenation.

third_party/WebKit/Source/wtf/text/StringOperators.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 116 matching lines @@
 inline StringAppend<const char*, String> operator+(const char* string1, const String& string2)
 {
     return StringAppend<const char*, String>(string1, string2);
 }
 
 inline StringAppend<const char*, AtomicString> operator+(const char* string1, const AtomicString& string2)
 {
     return StringAppend<const char*, AtomicString>(string1, string2);
 }
 
+inline StringAppend<const char*, StringView> operator+(const char* string1, const StringView& string2)
+{
+    return StringAppend<const char*, StringView>(string1, string2);
+}
+
 template<typename U, typename V>
 inline StringAppend<const char*, StringAppend<U, V>> operator+(const char* string1, const StringAppend<U, V>& string2)
 {
     return StringAppend<const char*, StringAppend<U, V>>(string1, string2);
 }
 
 inline StringAppend<const UChar*, String> operator+(const UChar* string1, const String& string2)
 {
     return StringAppend<const UChar*, String>(string1, string2);
 }
 
 inline StringAppend<const UChar*, AtomicString> operator+(const UChar* string1, const AtomicString& string2)
 {
     return StringAppend<const UChar*, AtomicString>(string1, string2);
 }
 
+inline StringAppend<const UChar*, StringView> operator+(const UChar* string1, const StringView& string2)
+{
+    return StringAppend<const UChar*, StringView>(string1, string2);
+}
+
 template<typename U, typename V>
 inline StringAppend<const UChar*, StringAppend<U, V>> operator+(const UChar* string1, const StringAppend<U, V>& string2)
 {
     return StringAppend<const UChar*, StringAppend<U, V>>(string1, string2);
 }
 
 template<typename T>
 StringAppend<String, T> operator+(const String& string1, T string2)
 {
     return StringAppend<String, T>(string1, string2);
 }
 
+template<typename T>
+StringAppend<AtomicString, T> operator+(const AtomicString& string1, T string2)
+{
+    return StringAppend<AtomicString, T>(string1, string2);
+}
+
+template<typename T>
+StringAppend<StringView, T> operator+(const StringView& string1, T string2)
+{
+    return StringAppend<StringView, T>(string1, string2);
+}
+
 template<typename U, typename V, typename W>
 StringAppend<StringAppend<U, V>, W> operator+(const StringAppend<U, V>& string1, W string2)
 {
     return StringAppend<StringAppend<U, V>, W>(string1, string2);
 }
 
 } // namespace WTF
 
 #endif // StringOperators_h