Adding functionality for activating for the WebRTC EchoCanceller3 functionality in Chrome.

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 49 matching lines @@
 CONTENT_EXPORT extern const base::Feature kStaleWhileRevalidate;
 CONTENT_EXPORT extern const base::Feature kTimerThrottlingForHiddenFrames;
 CONTENT_EXPORT extern const base::Feature kTokenBinding;
 CONTENT_EXPORT extern const base::Feature kTouchpadAndWheelScrollLatching;
 CONTENT_EXPORT extern const base::Feature kVrShell;
 CONTENT_EXPORT extern const base::Feature kWebAssembly;
 CONTENT_EXPORT extern const base::Feature kWebGLImageChromium;
 CONTENT_EXPORT extern const base::Feature kWebRtcEcdsaDefault;
 CONTENT_EXPORT extern const base::Feature kWebRtcHWH264Encoding;
 CONTENT_EXPORT extern const base::Feature kWebRtcUseGpuMemoryBufferVideoFrames;
+CONTENT_EXPORT extern const base::Feature kUseEchoCanceller3;

[mcasas, 2017/02/10 18:13:01]

This should be ordered alphabetically.  
Or just s/kUseEcho/kWebRtcUseEcho/ which
will probably be better long term.

[peah, 2017/02/15 13:24:24]

Thanks!
Great name suggestion as well!
Done.

 CONTENT_EXPORT extern const base::Feature kWebUsb;
 CONTENT_EXPORT
 extern const base::Feature kSendBeaconThrowForBlobWithNonSimpleType;
 
 #if defined(OS_ANDROID)
 CONTENT_EXPORT extern const base::Feature kImeThread;
 CONTENT_EXPORT extern const base::Feature kSeccompSandboxAndroid;
 CONTENT_EXPORT extern const base::Feature kServiceWorkerPaymentApps;
 CONTENT_EXPORT extern const base::Feature kWebPayments;
 #endif  // defined(OS_ANDROID)
 
 #if !defined(OS_ANDROID)
 CONTENT_EXPORT extern const base::Feature
     kCrossOriginMediaPlaybackRequiresUserGesture;
 #endif  // !defined(OS_ANDROID)
 
 #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_