Updated to Clang 3.5a.

Change-Id: I8127eb568f674c2e72635b639a3295381fe8af82
diff --git a/lib/ARCMigrate/Transforms.h b/lib/ARCMigrate/Transforms.h
index eab5e85..54be5b5 100644
--- a/lib/ARCMigrate/Transforms.h
+++ b/lib/ARCMigrate/Transforms.h
@@ -127,29 +127,29 @@
 
 class PropertyRewriteTraverser : public ASTTraverser {
 public:
-  virtual void traverseObjCImplementation(ObjCImplementationContext &ImplCtx);
+  void traverseObjCImplementation(ObjCImplementationContext &ImplCtx) override;
 };
 
 class BlockObjCVariableTraverser : public ASTTraverser {
 public:
-  virtual void traverseBody(BodyContext &BodyCtx);
+  void traverseBody(BodyContext &BodyCtx) override;
 };
 
 class ProtectedScopeTraverser : public ASTTraverser {
 public:
-  virtual void traverseBody(BodyContext &BodyCtx);
+  void traverseBody(BodyContext &BodyCtx) override;
 };
 
 // GC transformations
 
 class GCAttrsTraverser : public ASTTraverser {
 public:
-  virtual void traverseTU(MigrationContext &MigrateCtx);
+  void traverseTU(MigrationContext &MigrateCtx) override;
 };
 
 class GCCollectableCallsTraverser : public ASTTraverser {
 public:
-  virtual void traverseBody(BodyContext &BodyCtx);
+  void traverseBody(BodyContext &BodyCtx) override;
 };
 
 //===----------------------------------------------------------------------===//