Disallow repeated PushManager.subscribes with different sender ids

content/public/common/push_messaging_status.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 CONTENT_PUBLIC_COMMON_PUSH_MESSAGING_STATUS_H_
 #define CONTENT_PUBLIC_COMMON_PUSH_MESSAGING_STATUS_H_
 
 namespace content {
 
 // Push registration success/error codes for internal use & reporting in UMA.
@@ skipping 39 matching lines @@
   // but we tell JS that permission was denied to not reveal incognito.
   PUSH_REGISTRATION_STATUS_INCOGNITO_PERMISSION_DENIED = 10,
 
   // Registration failed because the public key could not be retrieved.
   PUSH_REGISTRATION_STATUS_PUBLIC_KEY_UNAVAILABLE = 11,
 
   // Registration failed because the manifest could not be retrieved or was
   // empty.
   PUSH_REGISTRATION_STATUS_MANIFEST_EMPTY_OR_MISSING = 12,
 
+  // Registration failed because a subscription with a different sender id
+  // already exists.
+  PUSH_REGISTRATION_STATUS_SENDER_ID_MISMATCH = 13,
+
   // NOTE: Do not renumber these as that would confuse interpretation of
   // previously logged data. When making changes, also update the enum list
   // in tools/metrics/histograms/histograms.xml to keep it in sync, and
   // update PUSH_REGISTRATION_STATUS_LAST below.
 
-  PUSH_REGISTRATION_STATUS_LAST =
-      PUSH_REGISTRATION_STATUS_MANIFEST_EMPTY_OR_MISSING
+  PUSH_REGISTRATION_STATUS_LAST = PUSH_REGISTRATION_STATUS_SENDER_ID_MISMATCH
 };
 
 // Push unregistration reason for reporting in UMA. Enum values can be added,
 // but must never be renumbered or deleted and reused.
 enum PushUnregistrationReason {
   // Should never happen.
   PUSH_UNREGISTRATION_REASON_UNKNOWN = 0,
 
   // Unregistering because the website called the unsubscribe API.
   PUSH_UNREGISTRATION_REASON_JAVASCRIPT_API = 1,
@@ skipping 146 matching lines @@
       PUSH_USER_VISIBLE_STATUS_REQUIRED_BUT_NOT_SHOWN_GRACE_EXCEEDED
 };
 
 const char* PushRegistrationStatusToString(PushRegistrationStatus status);
 
 const char* PushUnregistrationStatusToString(PushUnregistrationStatus status);
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_PUSH_MESSAGING_STATUS_H_