Fix up _some_web app directory StrictMode violations

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappLauncherActivity.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.webapps;
 
 import android.app.Activity;
 import android.content.Intent;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.util.Base64;
 
 import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.base.ApplicationStatus;
 import org.chromium.base.Log;
 import org.chromium.chrome.browser.ShortcutHelper;
 import org.chromium.chrome.browser.WebappAuthenticator;
 import org.chromium.chrome.browser.document.ChromeLauncherActivity;
 import org.chromium.chrome.browser.metrics.LaunchMetrics;
 import org.chromium.chrome.browser.tab.Tab;
-import org.chromium.chrome.browser.util.FeatureUtilities;
 import org.chromium.chrome.browser.util.IntentUtils;
 
 import java.lang.ref.WeakReference;
 
 /**
  * Launches web apps.  This was separated from the ChromeLauncherActivity because the
  * ChromeLauncherActivity is not allowed to be excluded from Android's Recents: crbug.com/517426.
  */
 public class WebappLauncherActivity extends Activity {
     /**
@@ skipping 19 matching lines @@
             String webappMacString = IntentUtils.safeGetStringExtra(
                     intent, ShortcutHelper.EXTRA_MAC);
             byte[] webappMac =
                     webappMacString == null ? null : Base64.decode(webappMacString, Base64.DEFAULT);
 
             Intent launchIntent = null;
             if (webappMac != null && WebappAuthenticator.isUrlValid(this, webappUrl, webappMac)) {
                 LaunchMetrics.recordHomeScreenLaunchIntoStandaloneActivity(webappUrl, webappSource);
 
                 String activityName = WebappActivity.class.getName();
-                if (!FeatureUtilities.isDocumentModeEligible(this)) {
+                if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
                     // Specifically assign the app to a particular WebappActivity instance.
                     int activityIndex = ActivityAssigner.instance(this).assign(webappId);
                     activityName += String.valueOf(activityIndex);
                 }
 
                 // Create an intent to launch the Webapp in an unmapped WebappActivity.
                 launchIntent = new Intent();
                 launchIntent.setClassName(this, activityName);
                 webappInfo.setWebappIntentExtras(launchIntent);
 
@@ skipping 37 matching lines @@
                     && webappActivity.getActivityTab().getId() == tabId) {
                 Tab tab = webappActivity.getActivityTab();
                 tab.getChromeWebContentsDelegateAndroid().activateContents();
                 return true;
             }
         }
 
         return false;
     }
 }