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diff --git a/Source/WebCore/Modules/encryptedmedia/MediaKeySystemAccess.cpp b/Source/WebCore/Modules/encryptedmedia/MediaKeySystemAccess.cpp
new file mode 100644
index 000000000..d84a48d06
--- /dev/null
+++ b/Source/WebCore/Modules/encryptedmedia/MediaKeySystemAccess.cpp
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2016 Metrological Group B.V.
+ * Copyright (C) 2016 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials provided
+ *    with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "MediaKeySystemAccess.h"
+
+#if ENABLE(ENCRYPTED_MEDIA)
+
+#include "CDM.h"
+#include "CDMInstance.h"
+#include "JSMediaKeys.h"
+#include "MediaKeySystemConfiguration.h"
+#include "MediaKeys.h"
+
+namespace WebCore {
+
+Ref<MediaKeySystemAccess> MediaKeySystemAccess::create(const String& keySystem, MediaKeySystemConfiguration&& configuration, Ref<CDM>&& implementation)
+{
+    return adoptRef(*new MediaKeySystemAccess(keySystem, WTFMove(configuration), WTFMove(implementation)));
+}
+
+MediaKeySystemAccess::MediaKeySystemAccess(const String& keySystem, MediaKeySystemConfiguration&& configuration, Ref<CDM>&& implementation)
+    : m_keySystem(keySystem)
+    , m_configuration(new MediaKeySystemConfiguration(WTFMove(configuration)))
+    , m_implementation(WTFMove(implementation))
+{
+}
+
+MediaKeySystemAccess::~MediaKeySystemAccess() = default;
+
+void MediaKeySystemAccess::createMediaKeys(Ref<DeferredPromise>&& promise)
+{
+    // https://w3c.github.io/encrypted-media/#dom-mediakeysystemaccess-createmediakeys
+    // W3C Editor's Draft 09 November 2016
+
+    // When this method is invoked, the user agent must run the following steps:
+    // 1. Let promise be a new promise.
+    // 2. Run the following steps in parallel:
+    m_taskQueue.enqueueTask([this, promise = WTFMove(promise)] () mutable {
+        // 2.1. Let configuration be the value of this object's configuration value.
+        // 2.2. Let use distinctive identifier be true if the value of configuration's distinctiveIdentifier member is "required" and false otherwise.
+        bool useDistinctiveIdentifier = m_configuration->distinctiveIdentifier == MediaKeysRequirement::Required;
+
+        // 2.3. Let persistent state allowed be true if the value of configuration's persistentState member is "required" and false otherwise.
+        bool persistentStateAllowed = m_configuration->persistentState == MediaKeysRequirement::Required;
+
+        // 2.4. Load and initialize the Key System implementation represented by this object's cdm implementation value if necessary.
+        m_implementation->loadAndInitialize();
+
+        // 2.5. Let instance be a new instance of the Key System implementation represented by this object's cdm implementation value.
+        auto instance = m_implementation->createInstance();
+        if (!instance) {
+            promise->reject(INVALID_STATE_ERR);
+            return;
+        }
+
+        // 2.6. Initialize instance to enable, disable and/or select Key System features using configuration.
+        if (instance->initializeWithConfiguration(*m_configuration) == CDMInstance::Failed) {
+            promise->reject(NotAllowedError);
+            return;
+        }
+
+        // 2.7. If use distinctive identifier is false, prevent instance from using Distinctive Identifier(s) and Distinctive Permanent Identifier(s).
+        if (!useDistinctiveIdentifier && instance->setDistinctiveIdentifiersAllowed(false) == CDMInstance::Failed) {
+            promise->reject(NotAllowedError);
+            return;
+        }
+
+        // 2.8. If persistent state allowed is false, prevent instance from persisting any state related to the application or origin of this object's Document.
+        if (!persistentStateAllowed && instance->setPersistentStateAllowed(false) == CDMInstance::Failed) {
+            promise->reject(NotAllowedError);
+            return;
+        }
+
+        // 2.9. If any of the preceding steps failed, reject promise with a new DOMException whose name is the appropriate error name.
+        // 2.10. Let media keys be a new MediaKeys object, and initialize it as follows:
+        // 2.10.1. Let the use distinctive identifier value be use distinctive identifier.
+        // 2.10.2. Let the persistent state allowed value be persistent state allowed.
+        // 2.10.3. Let the supported session types value be be the value of configuration's sessionTypes member.
+        // 2.10.4. Let the cdm implementation value be this object's cdm implementation value.
+        // 2.10.5. Let the cdm instance value be instance.
+        auto mediaKeys = MediaKeys::create(useDistinctiveIdentifier, persistentStateAllowed, m_configuration->sessionTypes, m_implementation.copyRef(), instance.releaseNonNull());
+
+        // 2.11. Resolve promise with media keys.
+        promise->resolveWithNewlyCreated<IDLInterface<MediaKeys>>(WTFMove(mediaKeys));
+    });
+
+    // 3. Return promise.
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(ENCRYPTED_MEDIA)