Fix VM implementation of CastError not to extend TypeError (issue 5280).

runtime/lib/errors.cc

 // 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.
 
-#include "lib/error.h"
-
 #include "vm/bootstrap_natives.h"
 #include "vm/exceptions.h"
 #include "vm/object_store.h"
 #include "vm/runtime_entry.h"
 #include "vm/stack_frame.h"
 
 namespace dart {
 
 DEFINE_FLAG(bool, trace_type_checks, false, "Trace runtime type checks.");
 
@@ skipping 27 matching lines @@
   args.SetAt(1, String::Handle(script.url()));
   args.SetAt(2, Smi::Handle(Smi::New(from_line)));
   args.SetAt(3, Smi::Handle(Smi::New(from_column)));
 
   Exceptions::ThrowByType(Exceptions::kAssertion, args);
   UNREACHABLE();
   return Object::null();
 }
 
 
-// Allocate and throw a new TypeError.
+// Allocate and throw a new TypeError or CastError.
 // Arg0: index of the token of the failed type check.
 // Arg1: src value.
 // Arg2: dst type name.
 // Arg3: dst name.
 // Arg4: type error message.
 // Return value: none, throws an exception.
 DEFINE_NATIVE_ENTRY(TypeError_throwNew, 5) {
   // No need to type check the arguments. This function can only be called
   // internally from the VM.
   intptr_t location = Smi::CheckedHandle(arguments->NativeArgAt(0)).Value();
@@ skipping 56 matching lines @@
   intptr_t line, column;
   script.GetTokenLocation(error_pos, &line, &column);
   args.SetAt(2, Smi::Handle(Smi::New(line)));
 
   Exceptions::ThrowByType(Exceptions::kAbstractClassInstantiation, args);
   UNREACHABLE();
   return Object::null();
 }
 
 }  // namespace dart