Add GetSequenceNumber function to PPB_Flash_Clipboard

chrome/browser/renderer_host/pepper/pepper_flash_clipboard_message_filter.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 "chrome/browser/renderer_host/pepper/pepper_flash_clipboard_message_filter.h"
 
 #include "base/pickle.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/browser/browser_thread.h"
 #include "ipc/ipc_message.h"
@@ skipping 119 matching lines @@
         OnMsgRegisterCustomFormat);
     PPAPI_DISPATCH_HOST_RESOURCE_CALL(
         PpapiHostMsg_FlashClipboard_IsFormatAvailable,
         OnMsgIsFormatAvailable);
     PPAPI_DISPATCH_HOST_RESOURCE_CALL(
         PpapiHostMsg_FlashClipboard_ReadData,
         OnMsgReadData);
     PPAPI_DISPATCH_HOST_RESOURCE_CALL(
         PpapiHostMsg_FlashClipboard_WriteData,
         OnMsgWriteData);
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_FlashClipboard_GetSequenceNumber,
+        OnMsgGetSequenceNumber);
   IPC_END_MESSAGE_MAP()
   return PP_ERROR_FAILED;
 }
 
 int32_t PepperFlashClipboardMessageFilter::OnMsgRegisterCustomFormat(
     ppapi::host::HostMessageContext* host_context,
     const std::string& format_name) {
   uint32_t format = custom_formats_.RegisterFormat(format_name);
   if (format == PP_FLASH_CLIPBOARD_FORMAT_INVALID)
     return PP_ERROR_FAILED;
@@ skipping 202 matching lines @@
   }
 
   if (res != PP_OK) {
     // Need to clear the objects so nothing is written.
     scw.Reset();
   }
 
   return res;
 }
 
+int32_t PepperFlashClipboardMessageFilter::OnMsgGetSequenceNumber(
+    ppapi::host::HostMessageContext* host_context,
+    uint32_t clipboard_type) {
+  if (clipboard_type != PP_FLASH_CLIPBOARD_TYPE_STANDARD) {
+    NOTIMPLEMENTED();
+    return PP_ERROR_FAILED;
+  }
+
+  ui::Clipboard* clipboard = ui::Clipboard::GetForCurrentThread();
+  ui::ClipboardType type = ConvertClipboardType(clipboard_type);
+  int64_t sequence_number = clipboard->GetSequenceNumber(type);
+  host_context->reply_msg =
+      PpapiPluginMsg_FlashClipboard_GetSequenceNumberReply(sequence_number);
+  return PP_OK;
+}
+
 }  // namespace chrome