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

chrome/android/java/src/org/chromium/chrome/browser/tab/TabWebContentsDelegateAndroid.java

 // 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.
 
 package org.chromium.chrome.browser.tab;
 
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.ActivityManager;
 import android.content.Context;
 import android.content.Intent;
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.media.AudioManager;
 import android.os.Build;
 import android.os.Handler;
 import android.util.Pair;
 import android.view.KeyEvent;
 import android.view.View;
 
 import org.chromium.base.Log;
 import org.chromium.base.ObserverList.RewindableIterator;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.blink_public.platform.WebDisplayMode;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.AppHooks;
-import org.chromium.chrome.browser.ChromeFeatureList;
-import org.chromium.chrome.browser.FullscreenWebContentsActivity;
 import org.chromium.chrome.browser.RepostFormWarningDialog;
 import org.chromium.chrome.browser.document.DocumentUtils;
 import org.chromium.chrome.browser.document.DocumentWebContentsDelegate;
 import org.chromium.chrome.browser.findinpage.FindMatchRectsDetails;
 import org.chromium.chrome.browser.findinpage.FindNotificationDetails;
 import org.chromium.chrome.browser.fullscreen.FullscreenManager;
 import org.chromium.chrome.browser.media.MediaCaptureNotificationService;
 import org.chromium.chrome.browser.media.VideoPersister;
 import org.chromium.chrome.browser.policy.PolicyAuditor;
 import org.chromium.chrome.browser.policy.PolicyAuditor.AuditEvent;
@@ skipping 171 matching lines @@
     @Override
     public void showRepostFormWarningDialog() {
         mTab.resetSwipeRefreshHandler();
         if (mTab.getActivity() == null) return;
         RepostFormWarningDialog warningDialog = new RepostFormWarningDialog(mTab);
         warningDialog.show(mTab.getActivity().getFragmentManager(), null);
     }
 
     @Override
     public void toggleFullscreenModeForTab(boolean enableFullscreen) {
-        if (ChromeFeatureList.isEnabled(ChromeFeatureList.FULLSCREEN_ACTIVITY)
-                && mTab.getActivity().supportsFullscreenActivity()) {
-            FullscreenWebContentsActivity.toggleFullscreenMode(enableFullscreen, mTab);
-        } else {
-            if (!VideoPersister.getInstance().shouldDelayFullscreenModeChange(
-                        mTab, enableFullscreen)) {
-                mTab.toggleFullscreenMode(enableFullscreen);
-            }
+        if (!VideoPersister.getInstance().shouldDelayFullscreenModeChange(mTab, enableFullscreen)) {
+            mTab.toggleFullscreenMode(enableFullscreen);
         }
     }
 
     @Override
     public void navigationStateChanged(int flags) {
         if ((flags & InvalidateTypes.TAB) != 0) {
             int mediaType = MediaCaptureNotificationService.getMediaType(
                     isCapturingAudio(), isCapturingVideo(), isCapturingScreen());
             MediaCaptureNotificationService.updateMediaNotificationForTab(
                     mTab.getApplicationContext(), mTab.getId(), mediaType, mTab.getUrl());
@@ skipping 289 matching lines @@
         };
     }
 
     private static native void nativeOnRendererUnresponsive(WebContents webContents);
     private static native void nativeOnRendererResponsive(WebContents webContents);
     private static native boolean nativeIsCapturingAudio(WebContents webContents);
     private static native boolean nativeIsCapturingVideo(WebContents webContents);
     private static native boolean nativeIsCapturingScreen(WebContents webContents);
     private static native void nativeNotifyStopped(WebContents webContents);
 }