Use SmallVectorImpl& for function arguments instead of SmallVector.

llvm-svn: 185715
diff --git a/clang/lib/Frontend/ChainedIncludesSource.cpp b/clang/lib/Frontend/ChainedIncludesSource.cpp
index cde84ca..442177e 100644
--- a/clang/lib/Frontend/ChainedIncludesSource.cpp
+++ b/clang/lib/Frontend/ChainedIncludesSource.cpp
@@ -26,9 +26,9 @@
 using namespace clang;
 
 static ASTReader *createASTReader(CompilerInstance &CI,
-                                  StringRef pchFile,  
-                                  SmallVector<llvm::MemoryBuffer *, 4> &memBufs,
-                                  SmallVector<std::string, 4> &bufNames,
+                             StringRef pchFile,
+                             SmallVectorImpl<llvm::MemoryBuffer *> &memBufs,
+                             SmallVectorImpl<std::string> &bufNames,
                              ASTDeserializationListener *deserialListener = 0) {
   Preprocessor &PP = CI.getPreprocessor();
   OwningPtr<ASTReader> Reader;