Update handling of ambiguous name references

runtime/vm/intrinsifier_mips.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_MIPS.
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 158 matching lines @@
 
 
 void Intrinsifier::ImmutableArray_getIndexed(Assembler* assembler) {
   return Array_getIndexed(assembler);
 }
 
 
 static intptr_t ComputeObjectArrayTypeArgumentsOffset() {
   const Library& core_lib = Library::Handle(Library::CoreLibrary());
   const Class& cls = Class::Handle(
-      core_lib.LookupClassAllowPrivate(Symbols::ObjectArray(), NULL));
+      core_lib.LookupClassAllowPrivate(Symbols::ObjectArray()));
   ASSERT(!cls.IsNull());
   ASSERT(cls.HasTypeArguments());
   ASSERT(cls.NumTypeArguments() == 1);
   const intptr_t field_offset = cls.type_arguments_field_offset();
   ASSERT(field_offset != Class::kNoTypeArguments);
   return field_offset;
 }
 
 
 // Intrinsify only for Smi value and index. Non-smi values need a store buffer
@@ skipping 1202 matching lines @@
 }
 
 
 //    var state = ((_A * (_state[kSTATE_LO])) + _state[kSTATE_HI]) & _MASK_64;
 //    _state[kSTATE_LO] = state & _MASK_32;
 //    _state[kSTATE_HI] = state >> 32;
 void Intrinsifier::Random_nextState(Assembler* assembler) {
   const Library& math_lib = Library::Handle(Library::MathLibrary());
   ASSERT(!math_lib.IsNull());
   const Class& random_class = Class::Handle(
-      math_lib.LookupClassAllowPrivate(Symbols::_Random(), NULL));
+      math_lib.LookupClassAllowPrivate(Symbols::_Random()));
   ASSERT(!random_class.IsNull());
   const Field& state_field = Field::ZoneHandle(
       random_class.LookupInstanceField(Symbols::_state()));
   ASSERT(!state_field.IsNull());
   const Field& random_A_field = Field::ZoneHandle(
       random_class.LookupStaticField(Symbols::_A()));
   ASSERT(!random_A_field.IsNull());
   ASSERT(random_A_field.is_const());
   const Instance& a_value = Instance::Handle(random_A_field.value());
   const int64_t a_int_value = Integer::Cast(a_value).AsInt64Value();
@@ skipping 321 matching lines @@
 
   __ Bind(&ok);
   __ Ret();
 
   __ Bind(&fall_through);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS