Pepper: Send dev/canary channel status to plugins.

ppapi/shared_impl/ppapi_nacl_channel_args.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/shared_impl/ppapi_nacl_channel_args.h"
 
 namespace ppapi {
 
 // We must provide explicit definitions of these functions for builds on
 // Windows.
-PpapiNaClChannelArgs::PpapiNaClChannelArgs() {
+PpapiNaClChannelArgs::PpapiNaClChannelArgs() : off_the_record(false),
+                                               supports_dev_channel(false) {
 }
 
 PpapiNaClChannelArgs::~PpapiNaClChannelArgs() {
 }
 
 }  // namespace ppapi