Make the ShortcutHelper toast instead of send the user home for web app banners

chrome/browser/android/shortcut_helper.h

 // Copyright 2013 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_SHORTCUT_HELPER_H_
 #define CHROME_BROWSER_ANDROID_SHORTCUT_HELPER_H_
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_weak_ref.h"
 #include "base/basictypes.h"
@@ skipping 73 matching lines @@
   // Adds a shortcut to the launcher using a FaviconRawBitmapResult.
   // Must be called from a WorkerPool task.
   static void AddShortcutInBackgroundWithRawBitmap(
       const ShortcutInfo& info,
       const favicon_base::FaviconRawBitmapResult& bitmap_result);
 
   // Adds a shortcut to the launcher using a SkBitmap.
   // Must be called from a WorkerPool task.
   static void AddShortcutInBackgroundWithSkBitmap(
       const ShortcutInfo& info,
-      const SkBitmap& icon_bitmap);
+      const SkBitmap& icon_bitmap,
+      const bool return_to_homescreen);
 
   // Registers JNI hooks.
   static bool RegisterShortcutHelper(JNIEnv* env);
 
  private:
   enum ManifestIconStatus {
     MANIFEST_ICON_STATUS_NONE,
     MANIFEST_ICON_STATUS_FETCHING,
     MANIFEST_ICON_STATUS_DONE
   };
@@ skipping 15 matching lines @@
   ManifestIconStatus manifest_icon_status_;
   const int preferred_icon_size_in_px_;
   static const int kPreferredIconSizeInDp;
 
   base::WeakPtrFactory<ShortcutHelper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ShortcutHelper);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_SHORTCUT_HELPER_H_