Remove duplicated provideMediaKeysTo() in MediaKeysClient.h

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 7ede51d3ea1574a8c7e2c03965f8f209169387cc..fee954437a6a88572b5f6528f265d4d3027473db 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -132,6 +132,7 @@
 #include "web/FullscreenController.h"
 #include "web/GraphicsLayerFactoryChromium.h"
 #include "web/LinkHighlight.h"
+#include "web/MediaKeysClientImpl.h"
 #include "web/PopupContainer.h"
 #include "web/PrerendererClientImpl.h"
 #include "web/SpeechRecognitionClientProxy.h"
@@ -406,7 +407,7 @@ WebViewImpl::WebViewImpl(WebViewClient* client)
     pageClients.storageClient = &m_storageClientImpl;
 
     m_page = adoptPtrWillBeNoop(new Page(pageClients));
-    MediaKeysController::provideMediaKeysTo(*m_page, &m_mediaKeysClientImpl);
+    MediaKeysController::provideMediaKeysTo(*m_page, MediaKeysClientImpl::create());
     provideSpeechRecognitionTo(*m_page, SpeechRecognitionClientProxy::create(client ? client->speechRecognizer() : 0));
     provideNavigatorContentUtilsTo(*m_page, NavigatorContentUtilsClientImpl::create(this));