[GCM] API update to allow only a single sender in registration

google_apis/gcm/engine/registration_request.cc

Index: google_apis/gcm/engine/registration_request.cc
diff --git a/google_apis/gcm/engine/registration_request.cc b/google_apis/gcm/engine/registration_request.cc
index a6fd0360b5e46f74495352d32be19aa7d7e71316..a16bcc7fe5f4be384756aa734339f259e08fcc58 100644
--- a/google_apis/gcm/engine/registration_request.cc
+++ b/google_apis/gcm/engine/registration_request.cc
@@ -33,9 +33,6 @@ const char kDeviceIdKey[] = "device";
 const char kLoginHeader[] = "AidLogin";
 const char kSenderKey[] = "sender";
 
-// Request validation constants.
-const size_t kMaxSenders = 100;
-
 // Response constants.
 const char kErrorPrefix[] = "Error=";
 const char kTokenPrefix[] = "token=";
@@ -88,12 +85,12 @@ RegistrationRequest::RequestInfo::RequestInfo(
     uint64 security_token,
     const std::string& app_id,
     const std::string& cert,
-    const std::vector<std::string>& sender_ids)
+    const std::string& sender_id)
     : android_id(android_id),
       security_token(security_token),
       app_id(app_id),
       cert(cert),
-      sender_ids(sender_ids) {
+      sender_id(sender_id) {
 }
 
 RegistrationRequest::RequestInfo::~RequestInfo() {}
@@ -120,8 +117,7 @@ void RegistrationRequest::Start() {
   DCHECK(request_info_.android_id != 0UL);
   DCHECK(request_info_.security_token != 0UL);
   DCHECK(!request_info_.cert.empty());
-  DCHECK(0 < request_info_.sender_ids.size() &&
-         request_info_.sender_ids.size() <= kMaxSenders);
+  DCHECK(!request_info_.sender_id.empty());
 
   DCHECK(!url_fetcher_.get());
   url_fetcher_.reset(net::URLFetcher::Create(
@@ -139,18 +135,7 @@ void RegistrationRequest::Start() {
   BuildFormEncoding(kAppIdKey, request_info_.app_id, &body);
   BuildFormEncoding(kCertKey, request_info_.cert, &body);
   BuildFormEncoding(kDeviceIdKey, android_id, &body);
-
-  std::string senders;
-  for (std::vector<std::string>::const_iterator iter =
-           request_info_.sender_ids.begin();
-       iter != request_info_.sender_ids.end();
-       ++iter) {
-    DCHECK(!iter->empty());
-    if (!senders.empty())
-      senders.append(",");
-    senders.append(*iter);
-  }
-  BuildFormEncoding(kSenderKey, senders, &body);
+  BuildFormEncoding(kSenderKey, request_info_.sender_id, &body);
 
   DVLOG(1) << "Performing registration for: " << request_info_.app_id;
   DVLOG(1) << "Registration request: " << body;