GCM Engine: Split up reg/unreg UNKNOWN_ERROR to improve metrics

google_apis/gcm/engine/registration_request.h

 // 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.
 
 #ifndef GOOGLE_APIS_GCM_ENGINE_REGISTRATION_REQUEST_H_
 #define GOOGLE_APIS_GCM_ENGINE_REGISTRATION_REQUEST_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 33 matching lines @@
     SUCCESS,                    // Registration completed successfully.
     INVALID_PARAMETERS,         // One of request paramteres was invalid.
     INVALID_SENDER,             // One of the provided senders was invalid.
     AUTHENTICATION_FAILED,      // Authentication failed.
     DEVICE_REGISTRATION_ERROR,  // Chrome is not properly registered.
     UNKNOWN_ERROR,              // Unknown error.
     URL_FETCHING_FAILED,        // URL fetching failed.
     HTTP_NOT_OK,                // HTTP status was not OK.
     NO_RESPONSE_BODY,           // No response body.
     REACHED_MAX_RETRIES,        // Reached maximum number of retries.
+    RESPONSE_PARSING_FAILED,    // Registration response parsing failed.
+    INTERNAL_SERVER_ERROR,      // Internal server error during request.
+    QUOTA_EXCEEDED,             // Registration quota exceeded.
+    TOO_MANY_REGISTRATIONS,     // Max registrations per device exceeded.
     // NOTE: always keep this entry at the end. Add new status types only
     // immediately above this line. Make sure to update the corresponding
     // histogram enum accordingly.
     STATUS_COUNT
   };
 
   // Callback completing the registration request.
   typedef base::Callback<void(Status status,
                               const std::string& registration_id)>
       RegistrationCallback;
@@ skipping 85 matching lines @@
   std::string source_to_record_;
 
   base::WeakPtrFactory<RegistrationRequest> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RegistrationRequest);
 };
 
 }  // namespace gcm
 
 #endif  // GOOGLE_APIS_GCM_ENGINE_REGISTRATION_REQUEST_H_