Redirects _blank and window.open() off-origin navigation from PWA to CCT.

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappTabDelegate.java

+// Copyright 2017 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.net.Uri;
+import android.support.customtabs.CustomTabsIntent;
+
+import org.chromium.chrome.browser.tab.Tab;
+import org.chromium.chrome.browser.tab.TabIdManager;
+import org.chromium.chrome.browser.tabmodel.AsyncTabParamsManager;
+import org.chromium.chrome.browser.tabmodel.TabModel.TabLaunchType;
+import org.chromium.chrome.browser.tabmodel.document.AsyncTabCreationParams;
+import org.chromium.chrome.browser.tabmodel.document.TabDelegate;
+
+/**
+ * Asynchronously creates Tabs for navigation originating from an installed PWA.
+ *
+ * This is the same as the parent class with exception of opening a Custom Tab for
+ * {@code _blank} links and {@code window.open(url)} calls instead of creating a new tab in Chrome.
+ */
+public class WebappTabDelegate extends TabDelegate {
+    private final WebappActivity mActivity;
+
+    public WebappTabDelegate(WebappActivity activity, boolean incognito) {
+        super(incognito);
+        this.mActivity = activity;
+    }
+
+    @Override
+    public void createNewTab(AsyncTabCreationParams asyncParams, TabLaunchType type, int parentId) {
+        int assignedTabId = TabIdManager.getInstance().generateValidId(Tab.INVALID_TAB_ID);
+        AsyncTabParamsManager.add(assignedTabId, asyncParams);
+
+        CustomTabsIntent customTabIntent =
+                new CustomTabsIntent.Builder().setShowTitle(true).build();
+
+        customTabIntent.intent.setPackage(mActivity.getPackageName());
+        addAsyncTabExtras(asyncParams, parentId, true, assignedTabId, customTabIntent.intent);
+        customTabIntent.launchUrl(mActivity, Uri.parse(asyncParams.getLoadUrlParams().getUrl()));
+    }
+}