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

chrome/browser/services/gcm/fake_gcm_profile_service.h

Index: chrome/browser/services/gcm/fake_gcm_profile_service.h
diff --git a/chrome/browser/services/gcm/fake_gcm_profile_service.h b/chrome/browser/services/gcm/fake_gcm_profile_service.h
index 1848c0b81beebbf2ade659e692c8d5b997efb464..d291f1cc0efbbedac77af0d00efeabafdaed912c 100644
--- a/chrome/browser/services/gcm/fake_gcm_profile_service.h
+++ b/chrome/browser/services/gcm/fake_gcm_profile_service.h
@@ -25,7 +25,7 @@ class FakeGCMProfileService : public GCMProfileService {
 
   // GCMProfileService overrides.
   virtual void Register(const std::string& app_id,
-                        const std::vector<std::string>& sender_ids,
+                        const std::string& sender_id,
                         const std::string& cert,
                         RegisterCallback callback) OVERRIDE;
   virtual void Send(const std::string& app_id,
@@ -34,7 +34,7 @@ class FakeGCMProfileService : public GCMProfileService {
                     SendCallback callback) OVERRIDE;
 
   void RegisterFinished(const std::string& app_id,
-                        const std::vector<std::string>& sender_ids,
+                        const std::string& sender_id,
                         const std::string& cert,
                         RegisterCallback callback);
 
@@ -55,8 +55,8 @@ class FakeGCMProfileService : public GCMProfileService {
     return last_registered_app_id_;
   }
 
-  const std::vector<std::string>& last_registered_sender_ids() const {
-    return last_registered_sender_ids_;
+  const std::string& last_registered_sender_id() const {
+    return last_registered_sender_id_;
   }
 
   const std::string& last_registered_cert() const {
@@ -72,7 +72,7 @@ class FakeGCMProfileService : public GCMProfileService {
   // furter verification in tests.
   bool collect_;
   std::string last_registered_app_id_;
-  std::vector<std::string> last_registered_sender_ids_;
+  std::string last_registered_sender_id_;
   std::string last_registered_cert_;
   GCMClient::OutgoingMessage last_sent_message_;
   std::string last_receiver_id_;