VM: Const-correctness fixes.

runtime/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/flags.h"
 
 #ifndef DART_PRECOMPILED
 
 #include "lib/invocation_mirror.h"
@@ skipping 440 matching lines @@
                                   const Script& script) {
   Thread* thread = Thread::Current();
   ASSERT(thread->long_jump_base()->IsSafeToJump());
   CSTAT_TIMER_SCOPE(thread, parser_timer);
   VMTagScope tagScope(thread, VMTag::kCompileTopLevelTagId);
   TimelineDurationScope tds(thread,
                             thread->isolate()->GetCompilerStream(),
                             "CompileTopLevel");
   if (tds.enabled()) {
     tds.SetNumArguments(1);
-    tds.CopyArgument(
-        0,
-        "script",
-        const_cast<char*>(String::Handle(script.url()).ToCString()));
+    tds.CopyArgument(0, "script", String::Handle(script.url()).ToCString());
   }
 
   Parser parser(script, library, 0);
   parser.ParseTopLevel();
 }
 
 
 void Parser::ComputeCurrentToken() {
   ASSERT(token_kind_ == Token::kILLEGAL);
   token_kind_ = tokens_iterator_.CurrentTokenKind();
@@ skipping 13988 matching lines @@
     const ArgumentListNode& function_args,
     const LocalVariable* temp_for_last_arg,
     bool is_super_invocation) {
   UNREACHABLE();
   return NULL;
 }
 
 }  // namespace dart
 
 #endif  // DART_PRECOMPILED