Move flash clipboard to the new proxy and add custom format support

ppapi/shared_impl/ppb_flash_shared.cc

 // Copyright (c) 2012 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 "ppapi/shared_impl/ppb_flash_shared.h"
 
 namespace ppapi {
 
 PPB_Flash_Shared::PPB_Flash_Shared() {
 }
 
 PPB_Flash_Shared::~PPB_Flash_Shared() {
 }
 
 void PPB_Flash_Shared::FreeDirContents(PP_Instance instance,
                                        PP_DirContents_Dev* contents) {
   for (int32_t i = 0; i < contents->count; ++i)
     delete[] contents->entries[i].name;
   delete[] contents->entries;
   delete contents;
 }
 
-// static
-bool PPB_Flash_Shared::IsValidClipboardType(
-    PP_Flash_Clipboard_Type clipboard_type) {
-  return clipboard_type == PP_FLASH_CLIPBOARD_TYPE_STANDARD ||
-         clipboard_type == PP_FLASH_CLIPBOARD_TYPE_SELECTION;
-}
-
-// static
-bool PPB_Flash_Shared::IsValidClipboardFormat(
-    PP_Flash_Clipboard_Format format) {
-  // Purposely excludes |PP_FLASH_CLIPBOARD_FORMAT_INVALID|.
-  return format == PP_FLASH_CLIPBOARD_FORMAT_PLAINTEXT ||
-         format == PP_FLASH_CLIPBOARD_FORMAT_HTML ||
-         format == PP_FLASH_CLIPBOARD_FORMAT_RTF;
-}
-
 }  // namespace ppapi