Migrate add to homescreen data fetcher to use InstallableManager.

chrome/browser/android/webapps/add_to_homescreen_dialog_helper.h

 // 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.
 
 #ifndef CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_DIALOG_HELPER_H_
 #define CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_DIALOG_HELPER_H_
 
 #include "base/android/jni_android.h"
-#include "base/android/jni_weak_ref.h"
+#include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "chrome/browser/android/shortcut_info.h"
 #include "chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h"
 #include "content/public/common/manifest.h"
+#include "third_party/skia/include/core/SkBitmap.h"
 
 namespace content {
 class WebContents;
 }  // namespace content
 
 namespace IPC {
 class Message;
 }
 
 class GURL;
@@ skipping 43 matching lines @@
   // in progress.
   bool add_shortcut_pending_;
 
   // Fetches data required to add a shortcut.
   scoped_refptr<AddToHomescreenDataFetcher> data_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(AddToHomescreenDialogHelper);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_DIALOG_HELPER_H_