Push API: Refactor and fix unsubscribe API

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 47 matching lines @@
 
   // 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 unregistration reason for reporting in UMA.
+enum PushUnregistrationReason {
+  // Unregistering because the website called the unsubscribe API.
+  PUSH_UNREGISTRATION_REASON_JAVASCRIPT_API = 0,
+
+  // Unregistering because the user manually revoked permission.
+  PUSH_UNREGISTRATION_REASON_PERMISSION_REVOKED = 1,
+
+  // Automatic - incoming message's app id was unknown.
+  PUSH_UNREGISTRATION_REASON_DELIVERY_UNKNOWN_APP_ID = 2,
+
+  // Automatic - incoming message's origin no longer has permission.
+  PUSH_UNREGISTRATION_REASON_DELIVERY_PERMISSION_DENIED = 3,
+
+  // Automatic - incoming message's service worker was not found.
+  PUSH_UNREGISTRATION_REASON_DELIVERY_NO_SERVICE_WORKER = 4,
+
+  // 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_UNREGISTRATION_REASON_LAST below.
+
+  PUSH_UNREGISTRATION_REASON_LAST =
+      PUSH_UNREGISTRATION_REASON_DELIVERY_NO_SERVICE_WORKER
+};
+
 // Push unregistration success/error codes for internal use & reporting in UMA.
 enum PushUnregistrationStatus {
   // The unregistration was successful.
   PUSH_UNREGISTRATION_STATUS_SUCCESS_UNREGISTERED = 0,
 
   // Unregistration was unnecessary, as the registration was not found.
   PUSH_UNREGISTRATION_STATUS_SUCCESS_WAS_NOT_REGISTERED = 1,
 
   // The unregistration did not happen because of a network error, but will be
   // retried until it succeeds.
@@ skipping 110 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_