[GCM] Fix gcm login to properly identify chrome

google_apis/gcm/engine/mcs_client.cc

Index: google_apis/gcm/engine/mcs_client.cc
diff --git a/google_apis/gcm/engine/mcs_client.cc b/google_apis/gcm/engine/mcs_client.cc
index 127f9bf6541566e9a9c020a6337abfe721ba4d2c..a3075f6e5825a97b691d50937f5a06f2eab5e99c 100644
--- a/google_apis/gcm/engine/mcs_client.cc
+++ b/google_apis/gcm/engine/mcs_client.cc
@@ -85,10 +85,12 @@ ReliablePacketInfo::ReliablePacketInfo()
 }
 ReliablePacketInfo::~ReliablePacketInfo() {}
 
-MCSClient::MCSClient(base::Clock* clock,
+MCSClient::MCSClient(const std::string& version_string,
+                     base::Clock* clock,
                      ConnectionFactory* connection_factory,
                      GCMStore* gcm_store)
-    : clock_(clock),
+    : version_string_(version_string),
+      clock_(clock),
       state_(UNINITIALIZED),
       android_id_(0),
       security_token_(0),
@@ -297,7 +299,10 @@ void MCSClient::ResetStateAndBuildLoginRequest(
 
   // Then build the request, consuming all pending acknowledgments.
   request->Swap(BuildLoginRequest(
-      android_id_, security_token_, user_serial_numbers_).get());
+      android_id_,
+      security_token_,
+      version_string_,
+      user_serial_numbers_).get());
   for (PersistentIdList::const_iterator iter =
            restored_unackeds_server_ids_.begin();
        iter != restored_unackeds_server_ids_.end(); ++iter) {