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.

llvm-svn: 135576
diff --git a/clang/lib/ARCMigrate/Internals.h b/clang/lib/ARCMigrate/Internals.h
index acbb0a5..a9ab093 100644
--- a/clang/lib/ARCMigrate/Internals.h
+++ b/clang/lib/ARCMigrate/Internals.h
@@ -57,15 +57,15 @@
   bool commitTransaction();
   void abortTransaction();
 
-  void insert(SourceLocation loc, llvm::StringRef text);
-  void insertAfterToken(SourceLocation loc, llvm::StringRef text);
+  void insert(SourceLocation loc, StringRef text);
+  void insertAfterToken(SourceLocation loc, StringRef text);
   void remove(SourceRange range);
   void removeStmt(Stmt *S);
-  void replace(SourceRange range, llvm::StringRef text);
+  void replace(SourceRange range, StringRef text);
   void replace(SourceRange range, SourceRange replacementRange);
-  void replaceStmt(Stmt *S, llvm::StringRef text);
-  void replaceText(SourceLocation loc, llvm::StringRef text,
-                   llvm::StringRef replacementText);
+  void replaceStmt(Stmt *S, StringRef text);
+  void replaceText(SourceLocation loc, StringRef text,
+                   StringRef replacementText);
   void increaseIndentation(SourceRange range,
                            SourceLocation parentIndent);
 
@@ -92,9 +92,9 @@
     return CapturedDiags.hasDiagnostic(IDs, range);
   }
 
-  void reportError(llvm::StringRef error, SourceLocation loc,
+  void reportError(StringRef error, SourceLocation loc,
                    SourceRange range = SourceRange());
-  void reportNote(llvm::StringRef note, SourceLocation loc,
+  void reportNote(StringRef note, SourceLocation loc,
                   SourceRange range = SourceRange());
 
   bool hasReportedErrors() const { return ReportedErrors; }
@@ -103,7 +103,7 @@
   public:
     virtual ~RewriteReceiver();
 
-    virtual void insert(SourceLocation loc, llvm::StringRef text) = 0;
+    virtual void insert(SourceLocation loc, StringRef text) = 0;
     virtual void remove(CharSourceRange range) = 0;
     virtual void increaseIndentation(CharSourceRange range,
                                      SourceLocation parentIndent) = 0;
@@ -148,7 +148,7 @@
 
 bool isARCDiagnostic(unsigned diagID, Diagnostic &Diag);
 
-static inline llvm::StringRef getARCMTMacroName() {
+static inline StringRef getARCMTMacroName() {
   return "__IMPL_ARCMT_REMOVED_EXPR__";
 }