Address review comments of previously submitted cl 8329005.

runtime/vm/object.h

 // Copyright (c) 2011, 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.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "vm/assert.h"
 #include "vm/dart.h"
 #include "vm/globals.h"
@@ skipping 408 matching lines @@
   // If this class is parameterized, each instance has a type_arguments field.
   intptr_t NumTypeArguments() const;
   static const intptr_t kNoTypeArguments = -1;
   intptr_t type_arguments_instance_field_offset() const {
     ASSERT(is_finalized() || is_prefinalized());
     return raw_ptr()->type_arguments_instance_field_offset_;
   }
   void set_type_arguments_instance_field_offset(intptr_t value) const {
     raw_ptr()->type_arguments_instance_field_offset_ = value;
   }
+  bool HasTypeArguments() const {
+    if (is_finalized() || is_prefinalized()) {
+      // More efficient than calling NumTypeArguments().
+      return type_arguments_instance_field_offset() != kNoTypeArguments;
+    } else {
+      // No need to check NumTypeArguments() if class has type parameters.
+      return (NumTypeParameters() > 0) || (NumTypeArguments() > 0);
+    }
+  }
 
   // The super type of this class, Object type if not explicitly specified.
   RawType* super_type() const { return raw_ptr()->super_type_; }
   void set_super_type(const Type& value) const;
 
   // Asserts that the class of the super type has been resolved.
   RawClass* SuperClass() const;
 
   // The factory type of this interface, null if not specified.
   RawType* factory_type() const { return raw_ptr()->factory_type_; }
@@ skipping 2429 matching lines @@
 }
 
 
 void Context::SetAt(intptr_t index, const Instance& value) const {
   StorePointer(InstanceAddr(index), value.raw());
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_