Remove recently introduced FunctionType vm class by merging it into class Type.

runtime/vm/symbols.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_SYMBOLS_H_
 #define VM_SYMBOLS_H_
 
 #include "vm/growable_array.h"
 #include "vm/object.h"
 #include "vm/snapshot_ids.h"
@@ skipping 119 matching lines @@
   V(CompleterSyncConstructor, "Completer.sync")                                \
   V(CompleterFuture, "future")                                                 \
   V(StreamIterator, "StreamIterator")                                          \
   V(StreamIteratorConstructor, "StreamIterator.")                              \
   V(Native, "native")                                                          \
   V(Class, "Class")                                                            \
   V(Null, "Null")                                                              \
   V(Dynamic, "dynamic")                                                        \
   V(UnresolvedClass, "UnresolvedClass")                                        \
   V(Type, "_Type")                                                             \
-  V(FunctionType, "_FunctionType")                                             \
   V(TypeRef, "_TypeRef")                                                       \
   V(TypeParameter, "_TypeParameter")                                           \
   V(BoundedType, "_BoundedType")                                               \
   V(MixinAppType, "_MixinAppType")                                             \
   V(TypeArguments, "TypeArguments")                                            \
   V(Patch, "patch")                                                            \
   V(PatchClass, "PatchClass")                                                  \
   V(Function, "Function")                                                      \
   V(_Closure, "_Closure")                                                      \
   V(FunctionResult, "function result")                                         \
@@ skipping 501 matching lines @@
   friend class SnapshotReader;
   friend class SnapshotWriter;
   friend class ApiMessageReader;
 
   DISALLOW_COPY_AND_ASSIGN(Symbols);
 };
 
 }  // namespace dart
 
 #endif  // VM_SYMBOLS_H_