Remove duplicated provideMediaKeysTo() in MediaKeysClient.h

Source/modules/encryptedmedia/MediaKeysController.cpp

 // 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.
 
 #include "config.h"
 #include "modules/encryptedmedia/MediaKeysController.h"
 
 #include "modules/encryptedmedia/MediaKeysClient.h"
 #include "public/platform/WebContentDecryptionModule.h"
 
 namespace WebCore {
 
 const char* MediaKeysController::supplementName()
 {
     return "MediaKeysController";
 }
 
-MediaKeysController::MediaKeysController(MediaKeysClient* client)
+MediaKeysController::MediaKeysController(PassOwnPtr<MediaKeysClient> client)
     : m_client(client)
 {
 }
 
+MediaKeysController::~MediaKeysController()
+{
+}
+
 PassOwnPtr<blink::WebContentDecryptionModule> MediaKeysController::createContentDecryptionModule(ExecutionContext* context, const String& keySystem)
 {
     return m_client->createContentDecryptionModule(context, keySystem);
 }
 
 
-void MediaKeysController::provideMediaKeysTo(Page& page, MediaKeysClient* client)
+void MediaKeysController::provideMediaKeysTo(Page& page, PassOwnPtr<MediaKeysClient> client)
 {
     MediaKeysController::provideTo(page, supplementName(), adoptPtrWillBeNoop(new MediaKeysController(client)));
 }
 
 } // namespace WebCore