Using FLAG_ACTIVITY_NEW_TASK flag for sharing in Chrome Shell.

chrome/android/shell/java/src/org/chromium/chrome/shell/ChromeShellActivity.java

 // Copyright 2014 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.shell;
 
 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.text.TextUtils;
@@ skipping 16 matching lines @@
 import org.chromium.chrome.browser.FileProviderHelper;
 import org.chromium.chrome.browser.appmenu.AppMenuHandler;
 import org.chromium.chrome.browser.appmenu.AppMenuPropertiesDelegate;
 import org.chromium.chrome.browser.dom_distiller.DomDistillerTabUtils;
 import org.chromium.chrome.browser.nfc.BeamController;
 import org.chromium.chrome.browser.nfc.BeamProvider;
 import org.chromium.chrome.browser.printing.PrintingControllerFactory;
 import org.chromium.chrome.browser.printing.TabPrinter;
 import org.chromium.chrome.browser.share.ShareHelper;
 import org.chromium.chrome.browser.tabmodel.TabModel.TabLaunchType;
+import org.chromium.chrome.browser.util.ChromeApiCompatibilityUtils;
 import org.chromium.chrome.shell.sync.SyncController;
 import org.chromium.components.dom_distiller.core.DomDistillerUrlUtils;
 import org.chromium.content.app.ContentApplication;
 import org.chromium.content.browser.ActivityContentVideoViewClient;
 import org.chromium.content.browser.BrowserStartupController;
 import org.chromium.content.browser.ContentViewCore;
 import org.chromium.content.browser.DeviceUtils;
 import org.chromium.printing.PrintManagerDelegateImpl;
 import org.chromium.printing.PrintingController;
 import org.chromium.sync.signin.AccountManagerHelper;
@@ skipping 301 matching lines @@
             if (activeTab != null && activeTab.canGoForward()) {
                 activeTab.goForward();
             }
             return true;
         } else if (id == R.id.new_tab_menu_id) {
             mTabManager.createNewTab();
             return true;
         } else if (id == R.id.share_menu_id || id == R.id.direct_share_menu_id) {
             ShareHelper.share(item.getItemId() == R.id.direct_share_menu_id, this,
                     activeTab.getTitle(), activeTab.getUrl(), null,
-                    Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
+                    ChromeApiCompatibilityUtils.getActivityNewDocumentFlag());
             return true;
         } else {
             return super.onOptionsItemSelected(item);
         }
     }
 
     private void waitForDebuggerIfNeeded() {
         if (CommandLine.getInstance().hasSwitch(BaseSwitches.WAIT_FOR_JAVA_DEBUGGER)) {
             Log.e(TAG, "Waiting for Java debugger to connect...");
             android.os.Debug.waitForDebugger();
@@ skipping 64 matching lines @@
     @VisibleForTesting
     public static void setActivityWindowAndroidFactory(ActivityWindowAndroidFactory factory) {
         sWindowAndroidFactory = factory;
     }
 
     @VisibleForTesting
     public static void setAppMenuHandlerFactory(AppMenuHandlerFactory factory) {
         sAppMenuHandlerFactory = factory;
     }
 }