✈ Remove unnecessary flag and DocumentModeManager.

chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.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.document;
 
 import android.annotation.SuppressLint;
-import android.annotation.TargetApi;
 import android.app.Activity;
-import android.app.ActivityManager;
-import android.app.ActivityManager.AppTask;
-import android.app.ActivityManager.RecentTaskInfo;
 import android.app.Notification;
 import android.app.PendingIntent;
 import android.app.SearchManager;
 import android.content.Context;
 import android.content.Intent;
-import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.provider.Browser;
 import android.support.customtabs.CustomTabsIntent;
 import android.text.TextUtils;
 
 import org.chromium.base.ApiCompatibilityUtils;
@@ skipping 16 matching lines @@
 import org.chromium.chrome.browser.customtabs.CustomTabActivity;
 import org.chromium.chrome.browser.customtabs.CustomTabIntentDataProvider;
 import org.chromium.chrome.browser.customtabs.SeparateTaskCustomTabActivity;
 import org.chromium.chrome.browser.firstrun.FirstRunFlowSequencer;
 import org.chromium.chrome.browser.metrics.LaunchMetrics;
 import org.chromium.chrome.browser.metrics.MediaNotificationUma;
 import org.chromium.chrome.browser.multiwindow.MultiWindowUtils;
 import org.chromium.chrome.browser.notifications.NotificationPlatformBridge;
 import org.chromium.chrome.browser.partnercustomizations.PartnerBrowserCustomizations;
 import org.chromium.chrome.browser.preferences.ChromePreferenceManager;
-import org.chromium.chrome.browser.preferences.DocumentModeManager;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tabmodel.DocumentModeAssassin;
 import org.chromium.chrome.browser.upgrade.UpgradeActivity;
 import org.chromium.chrome.browser.util.FeatureUtilities;
 import org.chromium.chrome.browser.util.IntentUtils;
 import org.chromium.chrome.browser.util.UrlUtilities;
 import org.chromium.chrome.browser.webapps.WebappLauncherActivity;
 
 import java.lang.ref.WeakReference;
 import java.net.URI;
-import java.util.List;
 import java.util.UUID;
 
 /**
  * Dispatches incoming intents to the appropriate activity based on the current configuration and
  * Intent fired.
  */
 public class ChromeLauncherActivity extends Activity
         implements IntentHandler.IntentHandlerDelegate {
     /**
      * Extra indicating launch mode used.
@@ skipping 67 matching lines @@
         // time at which the intent was received.
         IntentHandler.addTimestampToIntent(getIntent());
         // Initialize the command line in case we've disabled document mode from there.
         CommandLineInitUtil.initCommandLine(this, ChromeApplication.COMMAND_LINE_FILE);
 
         // Read partner browser customizations information asynchronously.
         // We want to initialize early because when there is no tabs to restore, we should possibly
         // show homepage, which might require reading PartnerBrowserCustomizations provider.
         PartnerBrowserCustomizations.initializeAsync(getApplicationContext(),
                 PARTNER_BROWSER_CUSTOMIZATIONS_TIMEOUT_MS);
-        maybePerformMigrationTasks();
         recordIntentMetrics();
 
         mIsInLegacyMultiInstanceMode =
                 MultiWindowUtils.getInstance().shouldRunInLegacyMultiInstanceMode(this);
         mIntentHandler = new IntentHandler(this, getPackageName());
         mIsCustomTabIntent = isCustomTabIntent();
         if (!mIsCustomTabIntent) {
             mIsHerbIntent = isHerbIntent();
             mIsCustomTabIntent = mIsHerbIntent;
         }
@@ skipping 90 matching lines @@
                     finish();
                 }
                 return;
             }
 
             // TODO(aruslan): FAIL.
             ApiCompatibilityUtils.finishAndRemoveTask(this);
         }
     }
 
-    /**
-     * If we have just opted in or opted out of document mode, perform pending migration tasks
-     * such as cleaning up the recents.
-     */
-    private void maybePerformMigrationTasks() {
-        if (DocumentModeManager.getInstance(this).isOptOutCleanUpPending()) {
-            cleanUpChromeRecents(
-                    DocumentModeManager.getInstance(this).isOptedOutOfDocumentMode());
-            DocumentModeManager.getInstance(this).setOptOutCleanUpPending(false);
-        }
-    }
-
     @Override
     public void processWebSearchIntent(String query) {
         Intent searchIntent = new Intent(Intent.ACTION_WEB_SEARCH);
         searchIntent.putExtra(SearchManager.QUERY, query);
         startActivity(searchIntent);
     }
 
     @Override
     public void processUrlViewIntent(String url, String referer, String headers,
             IntentHandler.TabOpenType tabOpenType, String externalAppId,
@@ skipping 189 matching lines @@
         if (uri != null && "content".equals(uri.getScheme())) {
             newIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
         }
         if (mIsInLegacyMultiInstanceMode) {
             MultiWindowUtils.getInstance().makeLegacyMultiInstanceIntent(this, newIntent);
         }
         startActivity(newIntent);
     }
 
     /**
-     * On opting out, remove all the old tasks from the recents.
-     * @param fromDocument Whether any possible migration was from document mode to classic.
-     */
-    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
-    private void cleanUpChromeRecents(boolean fromDocument) {
-        ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
-        List<ActivityManager.AppTask> taskList = am.getAppTasks();
-        PackageManager pm = getPackageManager();
-        for (int i = 0; i < taskList.size(); i++) {
-            AppTask task = taskList.get(i);
-            String className = DocumentUtils.getTaskClassName(task, pm);
-            if (className == null) continue;
-
-            RecentTaskInfo taskInfo = DocumentUtils.getTaskInfoFromTask(task);
-            if (taskInfo == null) continue;
-
-            // Skip the document activities if we are migrating from classic to document.
-            boolean skip = !fromDocument && DocumentActivity.isDocumentActivity(className);
-            if (!skip && (taskInfo.id != getTaskId())) {
-                taskList.get(i).finishAndRemoveTask();
-            }
-        }
-    }
-
-    /**
      * @return Whether there is already an browser instance of Chrome already running.
      */
     public boolean isChromeBrowserActivityRunning() {
         for (WeakReference<Activity> reference : ApplicationStatus.getRunningActivities()) {
             Activity activity = reference.get();
             if (activity == null) continue;
 
             String className = activity.getClass().getName();
             if (TextUtils.equals(className, ChromeTabbedActivity.class.getName())) {
                 return true;
@@ skipping 34 matching lines @@
         IntentHandler.ExternalAppId source =
                 IntentHandler.determineExternalIntentSource(getPackageName(), intent);
         if (intent.getPackage() == null && source != IntentHandler.ExternalAppId.CHROME) {
             int flagsOfInterest = Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_NEW_DOCUMENT;
             int maskedFlags = intent.getFlags() & flagsOfInterest;
             sIntentFlagsHistogram.record(maskedFlags);
         }
         MediaNotificationUma.recordClickSource(intent);
     }
 }