Do not allow allocation of FallThroughError and AssertionError by the user.

runtime/vm/parser.cc

 // 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.
 
 #include "vm/parser.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/compiler_stats.h"
@@ skipping 12 matching lines @@
 
 DEFINE_FLAG(bool, enable_asserts, false, "Enable assert statements.");
 DEFINE_FLAG(bool, enable_type_checks, false, "Enable type checks.");
 DEFINE_FLAG(bool, trace_parser, false, "Trace parser operations.");
 DEFINE_FLAG(bool, warning_as_error, false, "Treat warnings as errors.");
 DEFINE_FLAG(bool, silent_warnings, false, "Silence warnings.");
 
 // All references to Dart names are listed here.
 static const char* kAssertionErrorName = "AssertionError";
 static const char* kFallThroughErrorName = "FallThroughError";
-static const char* kThrowNewName = "throwNew";
+static const char* kThrowNewName = "_throwNew";
 static const char* kGrowableObjectArrayFromArrayName =
     "GrowableObjectArray._usingArray";
 static const char* kGrowableObjectArrayName = "GrowableObjectArray";
 static const char* kMutableMapName = "MutableMap";
 static const char* kMutableMapFromLiteralName = "fromLiteral";
 static const char* kImmutableMapName = "ImmutableMap";
 static const char* kImmutableMapConstructorName = "ImmutableMap.";
 static const char* kStringClassName = "StringBase";
 static const char* kInterpolateName = "_interpolate";
 static const char* kThisName = "this";
@@ skipping 7332 matching lines @@
 }
 
 
 void Parser::SkipNestedExpr() {
   const bool saved_mode = SetAllowFunctionLiterals(true);
   SkipExpr();
   SetAllowFunctionLiterals(saved_mode);
 }
 
 }  // namespace dart