Record how often we end up in Chrome from external navigations.

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 14 matching lines @@
     /**
      * Determine if Chrome is the default or only handler for a given intent. If true, Chrome
      * will handle the intent when started.
      */
     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);
+    boolean isSpecializedHandlerAvailable(List<ResolveInfo> infos);
 
     /**
      * 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.
@@ skipping 53 matching lines @@
      * @param referrerUrl The HTTP referrer URL.
      * @param tab The current tab.
      * @return OverrideUrlLoadingResult (if the tab has been clobbered, or we're launching an
      *         intent.)
      */
     OverrideUrlLoadingResult clobberCurrentTab(String url, String referrerUrl, Tab tab);
 
     /** Adds a window id to the intent, if necessary. */
     void maybeSetWindowId(Intent intent);
 
+    /** Adds the package name of a specialized intent handler. */
+    void maybeRecordAppHandlersInIntent(Intent intent, List<ResolveInfo> info);
+
     /**
      * Determine if the Chrome app is in the foreground.
      */
     boolean isChromeAppInForeground();
 
     /**
      * Check if Chrome is running in document mode.
      */
     boolean isDocumentMode();
 
     /**
      * @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);
 }