Add --dart-flags and --disable-dart command line switches.

webkit/tools/test_shell/test_shell_main.cc

Index: webkit/tools/test_shell/test_shell_main.cc
diff --git a/webkit/tools/test_shell/test_shell_main.cc b/webkit/tools/test_shell/test_shell_main.cc
index cc2341e62a75dfd02795505758276763cd7c4f45..53c17923b35ba1e7fc184042f6f08c05c9ea6c35 100644
--- a/webkit/tools/test_shell/test_shell_main.cc
+++ b/webkit/tools/test_shell/test_shell_main.cc
@@ -286,6 +286,11 @@ int main(int argc, char* argv[]) {
         extensions_v8::HeapProfilerExtension::Get());
   }
 
+  if (parsed_command_line.HasSwitch(test_shell::kDartFlags)) {
+    webkit_glue::SetDartFlags(
+        parsed_command_line.GetSwitchValueASCII(test_shell::kDartFlags));
+  }
+
   // Load and initialize the stats table.  Attempt to construct a somewhat
   // unique name to isolate separate instances from each other.