Raw string followup. Pass a couple StringRefs by value.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@137301 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Lex/LiteralSupport.h

@@ -197,7 +197,7 @@ public:
 
 private:
   void init(const Token *StringToks, unsigned NumStringToks);
-  void CopyStringFragment(const StringRef &Fragment);
+  void CopyStringFragment(StringRef Fragment);
 };
 
 }  // end namespace clang

lib/Lex/LiteralSupport.cpp

@@ -1119,7 +1119,7 @@ void StringLiteralParser::init(const Token *StringToks, unsigned NumStringToks){
 
 /// copyStringFragment - This function copies from Start to End into ResultPtr.
 /// Performs widening for multi-byte characters.
-void StringLiteralParser::CopyStringFragment(const StringRef &Fragment) {
+void StringLiteralParser::CopyStringFragment(StringRef Fragment) {
   // Copy the character span over.
   if (CharByteWidth == 1) {
     memcpy(ResultPtr, Fragment.data(), Fragment.size());

lib/Lex/TokenConcatenation.cpp

@@ -19,7 +19,7 @@ using namespace clang;
 
 /// IsStringPrefix - Return true if Str is a string prefix.
 /// 'L', 'u', 'U', or 'u8'. Including raw versions.
-static bool IsStringPrefix(const StringRef &Str, bool CPlusPlus0x) {
+static bool IsStringPrefix(StringRef Str, bool CPlusPlus0x) {
 
   if (Str[0] == 'L' ||
       (CPlusPlus0x && (Str[0] == 'u' || Str[0] == 'U' || Str[0] == 'R'))) {