Revert of 📺 Move fullscreen web content to a new Activity.

chrome/browser/android/chrome_feature_list.cc

 // 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.
 
 #include "chrome/browser/android/chrome_feature_list.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 126 matching lines @@
 const base::Feature kCustomContextMenu{"CustomContextMenu",
                                        base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kCustomFeedbackUi{"CustomFeedbackUi",
                                       base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kDownloadAutoResumptionThrottling{
     "DownloadAutoResumptionThrottling", base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kFullscreenActivity{"FullscreenActivity",
-                                        base::FEATURE_DISABLED_BY_DEFAULT};
+                                        base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kImportantSitesInCBD{"ImportantSitesInCBD",
                                          base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Makes "Add to Home screen" in the app menu generate an APK for the shortcut
 // URL which opens Chrome in fullscreen.
 const base::Feature kImprovedA2HS{"ImprovedA2HS",
                                   base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kNewPhotoPicker{"NewPhotoPicker",
@@ skipping 115 matching lines @@
   return base::GetFieldTrialParamByFeatureAsBool(*feature, param_name,
                                                  jdefault_value);
 }
 
 bool RegisterChromeFeatureListJni(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace chrome