Allow separately blacklisting Stage3D baseline mode.

ppapi/api/private/ppb_flash.idl

Index: ppapi/api/private/ppb_flash.idl
diff --git a/ppapi/api/private/ppb_flash.idl b/ppapi/api/private/ppb_flash.idl
index 692b864af51282aa0c579ed0b32b9b946c5bf0fa..bedef84890ebd745b352e2282078385a30287b68 100644
--- a/ppapi/api/private/ppb_flash.idl
+++ b/ppapi/api/private/ppb_flash.idl
@@ -84,7 +84,15 @@ enum PP_FlashSetting {
    * Specifies restrictions on how flash should handle LSOs. The result is an
    * int from <code>PP_FlashLSORestrictions</code>.
    */
-  PP_FLASHSETTING_LSORESTRICTIONS = 6
+  PP_FLASHSETTING_LSORESTRICTIONS = 6,
+
+  /**
+   * Specifies if the driver is reliable enough to use Shader Model 3 commands
+   * with it.
+   *
+   * This should only be enabled if PP_FLASHSETTING_STAGE3DENABLED is true.
+   */
+  PP_FLASHSETTING_STAGE3DBASELINEENABLED = 7
 };
 
 /**