Gentle start with removing explicit interfaces

runtime/vm/object.h

 // Copyright (c) 2012, 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 "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 857 matching lines @@
   // Check if this type represents the 'bool' interface.
   bool IsBoolInterface() const;
 
   // Check if this type represents the 'int' interface.
   bool IsIntInterface() const;
 
   // Check if this type represents the 'double' interface.
   bool IsDoubleInterface() const;
 
   // Check if this type represents the 'num' interface.
-  bool IsNumberInterface() const;
+  bool IsNumber() const;
 
   // Check if this type represents the 'String' interface.
   bool IsStringInterface() const;
 
-  // Check if this type represents the 'Function' interface.
-  bool IsFunctionInterface() const;
+  // Check if this type represents the 'Function' type.
+  bool IsFunction() const;
 
   // Check if this type represents the 'List' interface.
   bool IsListInterface() const;
 
   // Check if this type is an interface type.
   bool IsInterfaceType() const {
     if (!HasResolvedTypeClass()) {
       return false;
     }
     const Class& cls = Class::Handle(type_class());
@@ skipping 91 matching lines @@
   // The 'bool' interface type.
   static RawType* BoolInterface();
 
   // The 'int' interface type.
   static RawType* IntInterface();
 
   // The 'double' interface type.
   static RawType* DoubleInterface();
 
   // The 'num' interface type.
-  static RawType* NumberInterface();
+  static RawType* Number();
 
   // The 'String' interface type.
   static RawType* StringInterface();
 
   // The 'Function' interface type.
-  static RawType* FunctionInterface();
+  static RawType* Function();
 
   // The 'List' interface type.
   static RawType* ListInterface();
 
   // The finalized type of the given non-parameterized class.
   static RawType* NewNonParameterizedType(const Class& type_class);
 
   static RawType* New(const Object& clazz,
                       const AbstractTypeArguments& arguments,
                       intptr_t token_pos,
@@ skipping 4504 matching lines @@
     if (this->CharAt(i) != str.CharAt(begin_index + i)) {
       return false;
     }
   }
   return true;
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_