[GCM] Use the correct content type to talk with server for all users

components/gcm_driver/gcm_channel_status_request.cc

 // Copyright 2014 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 "components/gcm_driver/gcm_channel_status_request.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "components/gcm_driver/gcm_backoff_policy.h"
 #include "components/gcm_driver/proto/gcm_channel_status.pb.h"
 #include "net/base/escape.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request_status.h"
 #include "url/gurl.h"
 
 namespace gcm {
 
 namespace {
 
 const char kGCMChannelStatusRequestURL[] =
     "https://clients4.google.com/chrome-sync/command/";
-const char kRequestContentType[] = "application/x-protobuf";
+const char kRequestContentType[] = "application/octet-stream";
 const char kGCMChannelTag[] = "gcm_channel";
 const int kDefaultPollIntervalSeconds = 60 * 60;  // 60 minutes.
 const int kMinPollIntervalSeconds = 30 * 60;  // 30 minutes.
 
 }  // namespace
 
 GCMChannelStatusRequest::GCMChannelStatusRequest(
     const scoped_refptr<net::URLRequestContextGetter>& request_context_getter,
     const GCMChannelStatusRequestCallback& callback)
     : request_context_getter_(request_context_getter),
@@ skipping 102 matching lines @@
                    weak_ptr_factory_.GetWeakPtr(),
                    false),
         backoff_entry_.GetTimeUntilRelease());
     return;
   }
 
   Start();
 }
 
 }  // namespace gcm