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

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

Index: third_party/WebKit/Source/modules/mediacapabilities/MediaDecodingAbility.cpp
diff --git a/third_party/WebKit/Source/modules/mediacapabilities/MediaDecodingAbility.cpp b/third_party/WebKit/Source/modules/mediacapabilities/MediaDecodingAbility.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..50f3cd31b257eb93740fe43d6343f3c1e47624b7
--- /dev/null
+++ b/third_party/WebKit/Source/modules/mediacapabilities/MediaDecodingAbility.cpp
@@ -0,0 +1,25 @@
+// 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/MediaDecodingAbility.h"
+
+namespace blink {
+
+MediaDecodingAbility::MediaDecodingAbility() = default;
+
+bool MediaDecodingAbility::supported() const {
+  return true;
+}
+
+bool MediaDecodingAbility::smooth() const {
+  return true;
+}
+
+bool MediaDecodingAbility::powerEfficient() const {
+  return true;
+}
+
+DEFINE_TRACE(MediaDecodingAbility) {}
+
+}  // namespace blink