Re-design Unsubscribe and getPermissionStatus mojo interfaces.

third_party/WebKit/Source/modules/push_messaging/PushError.cpp

Index: third_party/WebKit/Source/modules/push_messaging/PushError.cpp
diff --git a/third_party/WebKit/Source/modules/push_messaging/PushError.cpp b/third_party/WebKit/Source/modules/push_messaging/PushError.cpp
index 7d7dc8996ef5b198cd6bd76e9669f6ff1ed93279..4600be6fc22293fcab4d10fa96c37debac4fb0a9 100644
--- a/third_party/WebKit/Source/modules/push_messaging/PushError.cpp
+++ b/third_party/WebKit/Source/modules/push_messaging/PushError.cpp
@@ -19,14 +19,15 @@ DOMException* PushError::take(ScriptPromiseResolver*,
       return DOMException::create(InvalidStateError, webError.message);
     case WebPushError::ErrorTypeNetwork:
       return DOMException::create(NetworkError, webError.message);
+    case WebPushError::ErrorTypeNone:
+      NOTREACHED();
+      return DOMException::create(UnknownError, webError.message);
     case WebPushError::ErrorTypeNotAllowed:
       return DOMException::create(NotAllowedError, webError.message);
     case WebPushError::ErrorTypeNotFound:
       return DOMException::create(NotFoundError, webError.message);
     case WebPushError::ErrorTypeNotSupported:
       return DOMException::create(NotSupportedError, webError.message);
-    case WebPushError::ErrorTypeUnknown:
-      return DOMException::create(UnknownError, webError.message);
   }
   NOTREACHED();
   return DOMException::create(UnknownError);