Add DISABLE_TCP_TRANSPORT flag in the Transport API.

ppapi/c/dev/ppb_transport_dev.h

Index: ppapi/c/dev/ppb_transport_dev.h
diff --git a/ppapi/c/dev/ppb_transport_dev.h b/ppapi/c/dev/ppb_transport_dev.h
index 159b7842adf62a805fab97e803620982c5a3ad79..963bd17e2289dde30e5e5f5cd88073ccb3a2faed 100644
--- a/ppapi/c/dev/ppb_transport_dev.h
+++ b/ppapi/c/dev/ppb_transport_dev.h
@@ -53,7 +53,11 @@ typedef enum {
   PP_TRANSPORTPROPERTY_TCP_NO_DELAY = 7,
 
   // Delay for ACK packets in milliseconds. By default set to 100ms.
-  PP_TRANSPORTPROPERTY_TCP_ACK_DELAY = 8
+  PP_TRANSPORTPROPERTY_TCP_ACK_DELAY = 8,
+
+  // Boolean value that disables TCP-based transports when set to
+  // true. By default set to false.
+  PP_TRANSPORTPROPERTY_DISABLE_TCP_TRANSPORT = 9
 } PP_TransportProperty;
 PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_TransportProperty, 4);