Fix issue 1950:

vm/parser.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 "vm/parser.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/compiler_stats.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/flags.h"
 #include "vm/growable_array.h"
 #include "vm/longjump.h"
 #include "vm/native_entry.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/resolver.h"
 #include "vm/scopes.h"
 
 namespace dart {
 
 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.");
 
+static void CheckedModeHandler(bool value) {
+  FLAG_enable_asserts = value;
+  FLAG_enable_type_checks = value;
+}
+
+DEFINE_FLAG_HANDLER(CheckedModeHandler,
+                    enable_checked_mode,
+                    "Enabled checked mode.");
+
 // All references to Dart names are listed here.
 static const char* kAssertionErrorName = "AssertionError";
 static const char* kTypeErrorName = "TypeError";
 static const char* kFallThroughErrorName = "FallThroughError";
 static const char* kStaticResolutionExceptionName = "StaticResolutionException";
 static const char* kThrowNewName = "_throwNew";
 static const char* kListLiteralFactoryClassName = "_ListLiteralFactory";
 static const char* kListLiteralFactoryName = "List.fromLiteral";
 static const char* kMapLiteralFactoryClassName = "_MapLiteralFactory";
 static const char* kMapLiteralFactoryName = "Map.fromLiteral";
@@ skipping 8121 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart