[Android WebAPK] Do not add padding to WebAPK primary icon

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 232 matching lines @@
           content::Manifest::Icon::IconPurpose::ANY);
   shortcut_info_.ideal_splash_image_size_in_px = ideal_splash_image_size_in_px_;
   shortcut_info_.minimum_splash_image_size_in_px =
       minimum_splash_image_size_in_px_;
 
   weak_observer_->OnUserTitleAvailable(shortcut_info_.user_title);
 
   if (data.primary_icon) {
     shortcut_info_.best_primary_icon_url = data.primary_icon_url;
 
-    CreateLauncherIcon(*(data.primary_icon));
+    if (webapk_compatible)
+      NotifyObserver(*data.primary_icon);
+    else
+      CreateLauncherIcon(*(data.primary_icon));
     return;
   }
 
   FetchFavicon();
 }
 
 void AddToHomescreenDataFetcher::FetchFavicon() {
   if (!web_contents() || !weak_observer_)
     return;
 
@@ skipping 76 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_);
 }