Make List constructor give better error messages for non-int arguments

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/object.h"
 #include "vm/snapshot_ids.h"
 
@@ skipping 273 matching lines @@
   V(AllocateInvocationMirror, "_allocateInvocationMirror")                     \
   V(toString, "toString")                                                      \
   V(_lookupHandler, "_lookupHandler")                                          \
   V(_handleMessage, "_handleMessage")                                          \
   V(DotCreate, "._create")                                                     \
   V(DotWithType, "._withType")                                                 \
   V(_get, "_get")                                                              \
   V(RangeError, "RangeError")                                                  \
   V(DotRange, ".range")                                                        \
   V(ArgumentError, "ArgumentError")                                            \
+  V(DotValue, ".value")                                                        \
   V(FormatException, "FormatException")                                        \
   V(UnsupportedError, "UnsupportedError")                                      \
   V(StackOverflowError, "StackOverflowError")                                  \
   V(OutOfMemoryError, "OutOfMemoryError")                                      \
   V(NullThrownError, "NullThrownError")                                        \
   V(IsolateSpawnException, "IsolateSpawnException")                            \
   V(IsolateUnhandledException, "_IsolateUnhandledException")                   \
   V(JavascriptIntegerOverflowError, "_JavascriptIntegerOverflowError")         \
   V(JavascriptCompatibilityError, "_JavascriptCompatibilityError")             \
   V(BooleanExpression, "boolean expression")                                   \
@@ skipping 328 matching lines @@
   friend class SnapshotReader;
   friend class SnapshotWriter;
   friend class ApiMessageReader;
 
   DISALLOW_COPY_AND_ASSIGN(Symbols);
 };
 
 }  // namespace dart
 
 #endif  // VM_SYMBOLS_H_