Update to match simplified llvm MemoryBuffer interfaces for files.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@49042 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/HeaderMap.cpp b/lib/Lex/HeaderMap.cpp
index 282e742..d058e1e 100644
--- a/lib/Lex/HeaderMap.cpp
+++ b/lib/Lex/HeaderMap.cpp
@@ -79,8 +79,7 @@
   if (FileSize <= sizeof(HMapHeader)) return 0;
   
   llvm::OwningPtr<const llvm::MemoryBuffer> FileBuffer( 
-    llvm::MemoryBuffer::getFile(FE->getName(), strlen(FE->getName()), 0,
-                                FE->getSize()));
+    llvm::MemoryBuffer::getFile(FE->getName(), 0, FE->getSize()));
   if (FileBuffer == 0) return 0;  // Unreadable file?
   const char *FileStart = FileBuffer->getBufferStart();