Address comments of committed change https://codereview.chromium.org/24397002/

runtime/vm/object.cc

Index: runtime/vm/object.cc
===================================================================
--- runtime/vm/object.cc	(revision 27836)
+++ runtime/vm/object.cc	(working copy)
@@ -4857,13 +4857,13 @@
   const GrowableObjectArray& pieces =
       GrowableObjectArray::Handle(GrowableObjectArray::New());
   const TypeArguments& instantiator = TypeArguments::Handle();
-  BuildSinatureParameters(false, kUserVisibleName, instantiator, pieces);
+  BuildSignatureParameters(false, kUserVisibleName, instantiator, pieces);
   const Array& strings = Array::Handle(Array::MakeArray(pieces));
   return String::ConcatAll(strings);
 }
 
 
-void Function::BuildSinatureParameters(
+void Function::BuildSignatureParameters(
     bool instantiate,
     NameVisibility name_visibility,
     const AbstractTypeArguments& instantiator,
@@ -4969,10 +4969,10 @@
     }
   }
   pieces.Add(Symbols::LParen());
-  BuildSinatureParameters(instantiate,
-                         name_visibility,
-                         instantiator,
-                         pieces);
+  BuildSignatureParameters(instantiate,
+                           name_visibility,
+                           instantiator,
+                           pieces);
   pieces.Add(Symbols::RParenArrow());
   AbstractType& res_type = AbstractType::Handle(result_type());
   if (instantiate && !res_type.IsInstantiated()) {