Let SourceManager::getBufferData return StringRef instead of a pair of two const char*.

llvm-svn: 98630
diff --git a/clang/lib/Rewrite/HTMLRewrite.cpp b/clang/lib/Rewrite/HTMLRewrite.cpp
index f325121..7b78070 100644
--- a/clang/lib/Rewrite/HTMLRewrite.cpp
+++ b/clang/lib/Rewrite/HTMLRewrite.cpp
@@ -44,7 +44,7 @@
   EOffset += Lexer::MeasureTokenLength(E, R.getSourceMgr(), R.getLangOpts());
 
   bool Invalid = false;
-  const char *BufferStart = SM.getBufferData(FID, &Invalid).first;
+  const char *BufferStart = SM.getBufferData(FID, &Invalid).data();
   if (Invalid)
     return;