Upstream: Launch WebAPK without showing intent picker when user taps link in WebAPK scope

chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegate.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.externalnav;
 
 import android.content.Intent;
 import android.content.pm.ResolveInfo;
 
 import org.chromium.chrome.browser.externalnav.ExternalNavigationHandler.OverrideUrlLoadingResult;
@@ skipping 17 matching lines @@
      */
     boolean willChromeHandleIntent(Intent intent);
 
     /**
      * Search for intent handlers that are specific to this URL aka, specialized apps like
      * google maps or youtube
      */
     boolean isSpecializedHandlerAvailable(List<ResolveInfo> intent);
 
     /**
+     * Returns the number of specialized intent handlers in {@params infos}. Specialized intent
+     * handlers are intent handlers which handle only a few URLs (e.g. google maps or youtube).
+     */
+    int countSpecializedHandlers(List<ResolveInfo> infos);
+
+    /**
+     * Returns the package name of the first valid WebAPK in {@link infos}.
+     * @param infos ResolveInfos to search.
+     * @return The package name of the first valid WebAPK. Null if no valid WebAPK was found.
+     */
+    String findValidWebApkPackageName(List<ResolveInfo> infos);
+
+    /**
      * Get the name of the package of the currently running activity so that incoming intents
      * can be identified as originating from this activity.
      */
     String getPackageName();
 
     /**
      * Start an activity for the intent. Used for intents that must be handled externally.
      */
     void startActivity(Intent intent);
 
@@ skipping 58 matching lines @@
     /**
      * @return Default SMS application's package name. Null if there isn't any.
      */
     String getDefaultSmsPackageName();
 
     /**
      * @return Whether the URL is a file download.
      */
     boolean isPdfDownload(String url);
 }