Media Capabilities: stub implementation of mediaCapabilities.query().

third_party/WebKit/Source/modules/mediacapabilities/MediaCapabilities.cpp

+// Copyright 2017 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 "modules/mediacapabilities/MediaCapabilities.h"
+
+#include "bindings/core/v8/ScriptPromise.h"
+#include "bindings/core/v8/ScriptPromiseResolver.h"
+#include "bindings/core/v8/ScriptState.h"
+#include "modules/mediacapabilities/MediaConfiguration.h"
+#include "modules/mediacapabilities/MediaDecodingAbility.h"
+
+namespace blink {
+
+MediaCapabilities::MediaCapabilities() = default;
+
+ScriptPromise MediaCapabilities::query(
+    ScriptState* scriptState,
+    const MediaConfiguration& configuration) {
+  ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
+  ScriptPromise promise = resolver->promise();
+  resolver->resolve(new MediaDecodingAbility());
+  return promise;
+}
+
+DEFINE_TRACE(MediaCapabilities) {}
+
+}  // namespace blink