Create Pepper-based CDM for EME WD (Blink changes)

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 5f302031d8c2a5b180ae036bb357dd666520d736..845b1a1a164b4f287e763e267da1a11ae912caec 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -362,6 +362,7 @@ WebViewImpl::WebViewImpl(WebViewClient* client)
     , m_speechRecognitionClient(SpeechRecognitionClientProxy::create(client ? client->speechRecognizer() : 0))
     , m_geolocationClientProxy(adoptPtr(new GeolocationClientProxy(client ? client->geolocationClient() : 0)))
     , m_userMediaClientImpl(this)
+    , m_mediaKeysClientImpl(MediaKeysClientImpl::create())
     , m_midiClientProxy(adoptPtr(new MIDIClientProxy(client ? client->webMIDIClient() : 0)))
     , m_navigatorContentUtilsClient(NavigatorContentUtilsClientImpl::create(this))
     , m_flingModifier(0)
@@ -388,6 +389,7 @@ WebViewImpl::WebViewImpl(WebViewClient* client)
 
     m_page = adoptPtr(new Page(pageClients));
     provideUserMediaTo(*m_page, &m_userMediaClientImpl);
+    provideMediaKeysTo(*m_page, m_mediaKeysClientImpl.get());
     provideMIDITo(*m_page, m_midiClientProxy.get());
 #if ENABLE(INPUT_SPEECH)
     provideSpeechInputTo(*m_page, m_speechInputClient.get());