now that we have a centralized place to do so, add some using declarations for
some common llvm types: stringref and smallvector.  This cleans up the codebase
quite a bit.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135576 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Driver/ToolChain.h b/include/clang/Driver/ToolChain.h
index 4836d3f..eaa1172 100644
--- a/include/clang/Driver/ToolChain.h
+++ b/include/clang/Driver/ToolChain.h
@@ -32,7 +32,7 @@
 /// ToolChain - Access to tools for a single platform.
 class ToolChain {
 public:
-  typedef llvm::SmallVector<std::string, 4> path_list;
+  typedef SmallVector<std::string, 4> path_list;
 
   enum CXXStdlibType {
     CST_Libcxx,
@@ -63,9 +63,9 @@
   const llvm::Triple &getTriple() const { return Triple; }
 
   llvm::Triple::ArchType getArch() const { return Triple.getArch(); }
-  llvm::StringRef getArchName() const { return Triple.getArchName(); }
-  llvm::StringRef getPlatform() const { return Triple.getVendorName(); }
-  llvm::StringRef getOS() const { return Triple.getOSName(); }
+  StringRef getArchName() const { return Triple.getArchName(); }
+  StringRef getPlatform() const { return Triple.getVendorName(); }
+  StringRef getOS() const { return Triple.getOSName(); }
 
   std::string getTripleString() const {
     return Triple.getTriple();