[WORK_IN_PROGRESS] PDF::Save() fix for out-of-process-pdf.

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 <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 2192 matching lines @@
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_PDF_UserMetricsRecordAction,
                      std::string /* action */)
 
 // Notifies the renderer that the current PDF uses an unsupported feature.
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_PDF_HasUnsupportedFeature)
 
 // Notifies the renderer to print the current PDF.
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_PDF_Print)
 
 // Notifies the renderer to save the current PDF.
-IPC_MESSAGE_CONTROL0(PpapiHostMsg_PDF_SaveAs)
+IPC_MESSAGE_CONTROL1(PpapiHostMsg_PDF_SaveAs,
+                     std::string /* url */)
 
 // Requests a resource image for the plugin at a particular scale.
 IPC_MESSAGE_CONTROL2(PpapiHostMsg_PDF_GetResourceImage,
                      PP_ResourceImage /* image_id */,
                      float /* scale */)
 
 // Reply for PpapiHostMsg_PDF_GetResourceImage containing the host resource id
 // of the image and a PP_ImageDataDesc which describes the image. Also carries
 // a shared memory handle pointing to the memory containg the image.
 IPC_MESSAGE_CONTROL2(PpapiPluginMsg_PDF_GetResourceImageReply,
@@ skipping 41 matching lines @@
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_Talk_RequestPermission,
                      PP_TalkPermission /* permission */)
 IPC_MESSAGE_CONTROL0(PpapiPluginMsg_Talk_RequestPermissionReply)
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_Talk_StartRemoting)
 IPC_MESSAGE_CONTROL0(PpapiPluginMsg_Talk_StartRemotingReply)
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_Talk_StopRemoting)
 IPC_MESSAGE_CONTROL0(PpapiPluginMsg_Talk_StopRemotingReply)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_Talk_NotifyEvent, PP_TalkEvent /* event */)
 
 #endif  // !defined(OS_NACL) && !defined(NACL_WIN64)