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

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index c074ff9a8aeb3964ebc17e1f6596db386cfd4bae..6b8b3addb89573da1ad97b68f859e394d66b27a1 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -33,6 +33,9 @@ const char kBrowserSubprocessPath[]         = "browser-subprocess-path";
 // as a dependent process of the Chrome Frame plugin.
 const char kChromeFrame[]                   = "chrome-frame";
 
+// Options to pass to the Dart VM.
+const char kDartFlags[]                     = "dart-flags";
+
 // Disables client-visible 3D APIs, in particular WebGL and Pepper 3D.
 // This is controlled by policy and is kept separate from the other
 // enable/disable switches to avoid accidentally regressing the policy
@@ -68,6 +71,9 @@ const char kDisableAudio[]                  = "disable-audio";
 // users with many windows/tabs and lots of memory.
 const char kDisableBackingStoreLimit[]      = "disable-backing-store-limit";
 
+// Prevent Dart from running.
+const char kDisableDart[]                   = "disable-dart";
+
 // Disables HTML5 DB support.
 const char kDisableDatabases[]              = "disable-databases";