Remove newMediaPlaybackUi flag from content/ and Blink.

content/public/common/content_features.h

 // Copyright 2015 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.
 
 // This file defines all the public base::FeatureList features for the content
 // module.
 
 #ifndef CONTENT_PUBLIC_COMMON_CONTENT_FEATURES_H_
 #define CONTENT_PUBLIC_COMMON_CONTENT_FEATURES_H_
 
@@ skipping 14 matching lines @@
 CONTENT_EXPORT extern const base::Feature kDocumentWriteEvaluator;
 CONTENT_EXPORT extern const base::Feature kExpensiveBackgroundTimerThrottling;
 CONTENT_EXPORT extern const base::Feature kFeaturePolicy;
 CONTENT_EXPORT extern const base::Feature kFontCacheScaling;
 CONTENT_EXPORT extern const base::Feature
     kFramebustingNeedsSameOriginOrUserGesture;
 CONTENT_EXPORT extern const base::Feature kGamepadExtensions;
 CONTENT_EXPORT extern const base::Feature kGenericSensor;
 CONTENT_EXPORT extern const base::Feature kMediaDocumentDownloadButton;
 CONTENT_EXPORT extern const base::Feature kMemoryCoordinator;
-CONTENT_EXPORT extern const base::Feature kNewMediaPlaybackUi;
 CONTENT_EXPORT extern const base::Feature kNonValidatingReloadOnNormalReload;
 CONTENT_EXPORT extern const base::Feature kNonValidatingReloadOnRefreshContent;
 CONTENT_EXPORT extern const base::Feature kOptimizeLoadingIPCForSmallResources;
 CONTENT_EXPORT extern const base::Feature kOriginTrials;
 CONTENT_EXPORT extern const base::Feature kParseHTMLOnMainThread;
 CONTENT_EXPORT extern const base::Feature kPassiveDocumentEventListeners;
 CONTENT_EXPORT extern const base::Feature kPassiveEventListenersDueToFling;
 CONTENT_EXPORT extern const base::Feature kPepper3DImageChromium;
 CONTENT_EXPORT extern const base::Feature kPointerEvents;
 CONTENT_EXPORT extern const base::Feature kPointerEventV1SpecCapturing;
@@ skipping 25 matching lines @@
 #if defined(OS_WIN)
 CONTENT_EXPORT extern const base::Feature kWinSboxDisableExtensionPoints;
 #endif  // defined(OS_WIN)
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace features
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_FEATURES_H_