Modified the pepper file chooser API to support filtering files by extensions.

ppapi/proxy/ppapi_messages.h

 // 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.
 
 // Multiply-included message header, no traditional include guard.
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
@@ skipping 1012 matching lines @@
 IPC_SYNC_MESSAGE_ROUTED2_2(PpapiHostMsg_PPBBuffer_Create,
                            PP_Instance /* instance */,
                            uint32_t /* size */,
                            ppapi::HostResource /* result_resource */,
                            base::SharedMemoryHandle /* result_shm_handle */)
 
 // PPB_FileChooser.
 IPC_SYNC_MESSAGE_ROUTED3_1(PpapiHostMsg_PPBFileChooser_Create,
                            PP_Instance /* instance */,
                            int /* mode */,
-                           std::string /* accept_mime_types */,
+                           std::string /* accept_types */,
                            ppapi::HostResource /* result */)
 IPC_MESSAGE_ROUTED4(PpapiHostMsg_PPBFileChooser_Show,
                     ppapi::HostResource /* file_chooser */,
                     PP_Bool /* save_as */,
                     ppapi::proxy::SerializedVar /* suggested_file_name */,
                     bool /* require_user_gesture */)
 
 // PPB_NetworkMonitor_Private.
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_PPBNetworkMonitor_Start,
                      uint32 /* plugin_dispatcher_id */)
@@ skipping 284 matching lines @@
 // PPB_X509Certificate_Private
 IPC_SYNC_MESSAGE_CONTROL1_2(PpapiHostMsg_PPBX509Certificate_ParseDER,
                             std::vector<char> /* der */,
                             bool /* succeeded */,
                             ppapi::PPB_X509Certificate_Fields /* result */)
 
 // PPB_Font.
 IPC_SYNC_MESSAGE_CONTROL0_1(PpapiHostMsg_PPBFont_GetFontFamilies,
                             std::string /* result */)
 #endif  // !defined(OS_NACL)