Remove PushPermissionClient.

Source/modules/push_messaging/PushPermissionRequestCallback.h

Index: Source/modules/push_messaging/PushPermissionRequestCallback.h
diff --git a/Source/modules/push_messaging/PushPermissionRequestCallback.h b/Source/modules/push_messaging/PushPermissionRequestCallback.h
deleted file mode 100644
index 8c82a53f26d398cd401a099c6ca2b682642022f2..0000000000000000000000000000000000000000
--- a/Source/modules/push_messaging/PushPermissionRequestCallback.h
+++ /dev/null
@@ -1,43 +0,0 @@
-// 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 PushPermissionRequestCallback_h
-#define PushPermissionRequestCallback_h
-
-#include "platform/heap/Handle.h"
-#include "public/platform/WebCallback.h"
-#include "wtf/Noncopyable.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefPtr.h"
-
-namespace blink {
-
-class PushManager;
-class ScriptPromiseResolver;
-class WebPushClient;
-class WebServiceWorkerProvider;
-
-class PushPermissionRequestCallback final : public WebCallback {
-    WTF_MAKE_NONCOPYABLE(PushPermissionRequestCallback);
-
-public:
-    // Since |PushManager| is oilpan garbage collected this will keep it alive.
-    // Does not take ownership of |WebPushClient|.
-    // Since |ScriptPromiseResolver| is ref counted this will keep it alive.
-    // Does not take ownership of |WebServiceWorkerProvider|.
-    PushPermissionRequestCallback(PushManager*, WebPushClient*, PassRefPtr<ScriptPromiseResolver>, WebServiceWorkerProvider*);
-    ~PushPermissionRequestCallback() override;
-
-    void run() override;
-
-private:
-    Persistent<PushManager> m_manager;
-    WebPushClient* m_client;
-    RefPtr<ScriptPromiseResolver> m_resolver;
-    WebServiceWorkerProvider* m_serviceWorkerProvider;
-};
-
-} // namespace blink
-
-#endif // PushPermissionRequestCallback_h