Enable pnacl by default

ppapi/native_client/src/trusted/plugin/plugin_error.h

Index: ppapi/native_client/src/trusted/plugin/plugin_error.h
diff --git a/ppapi/native_client/src/trusted/plugin/plugin_error.h b/ppapi/native_client/src/trusted/plugin/plugin_error.h
index 9da77cab2045200318608169328e577dc6c7d48b..06ffc19eb310d69df701fab98fd6a1b0c8645d17 100644
--- a/ppapi/native_client/src/trusted/plugin/plugin_error.h
+++ b/ppapi/native_client/src/trusted/plugin/plugin_error.h
@@ -93,9 +93,7 @@ enum PluginErrorCode {
   ERROR_PNACL_LLC_INTERNAL = 65,
   ERROR_PNACL_LD_INTERNAL = 66,
   ERROR_PNACL_CREATE_TEMP = 67,
-  // Remove this next code when pnacl is no longer behind a flag (when we
-  // remove the --enable-pnacl flag).
-  ERROR_PNACL_NOT_ENABLED = 68,
+  ERROR_PNACL_DISABLED = 68,

[Mark Seaborn, 2013/07/22 23:28:10]

Should this have a different UMA code from ERROR_PNACL_NOT_ENABLED? 
ERROR_PNACL_DISABLED is the result of user action, whereas
ERROR_PNACL_NOT_ENABLED is the result of user inaction.

[sehr, 2013/07/23 22:03:26]

I have reverted this change.

   ERROR_MANIFEST_NOACCESS_URL = 69,
   ERROR_NEXE_NOACCESS_URL = 70,
   // If you add a code, read the enum comment above on how to update histograms.