Introduce dedicated enum value for icons from Web Manifests

chrome/browser/android/webapps/add_to_homescreen_data_fetcher.cc

 // 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.
 
 #include "chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 246 matching lines @@
 }
 
 void AddToHomescreenDataFetcher::FetchFavicon() {
   if (!web_contents() || !weak_observer_)
     return;
 
   // Grab the best, largest icon we can find to represent this bookmark.
   // TODO(dfalcantara): Try combining with the new BookmarksHandler once its
   //                    rewrite is further along.
   std::vector<int> icon_types{
-      favicon_base::FAVICON,
+      favicon_base::WEB_MANIFEST_ICON, favicon_base::FAVICON,
       favicon_base::TOUCH_PRECOMPOSED_ICON | favicon_base::TOUCH_ICON};
 
   favicon::FaviconService* favicon_service =
       FaviconServiceFactory::GetForProfile(
           Profile::FromBrowserContext(web_contents()->GetBrowserContext()),
           ServiceAccessType::EXPLICIT_ACCESS);
 
   // Using favicon if its size is not smaller than platform required size,
   // otherwise using the largest icon among all avaliable icons.
   int threshold_to_get_any_largest_icon = ideal_icon_size_in_px_ - 1;
@@ skipping 61 matching lines @@
 void AddToHomescreenDataFetcher::NotifyObserver(const SkBitmap& primary_icon) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   if (!web_contents() || !weak_observer_ || is_icon_saved_)
     return;
 
   is_icon_saved_ = true;
   primary_icon_ = primary_icon;
   is_ready_ = true;
   weak_observer_->OnDataAvailable(shortcut_info_, primary_icon_, badge_icon_);
 }