Convert the flash clipboard API to thunk system.

ppapi/thunk/thunk.h

Index: ppapi/thunk/thunk.h
diff --git a/ppapi/thunk/thunk.h b/ppapi/thunk/thunk.h
index 08b6f2da2d8965627ca6c51b4e5ae83c887d5270..c19774578070c914e4ce8fcdbd0177d13250e36b 100644
--- a/ppapi/thunk/thunk.h
+++ b/ppapi/thunk/thunk.h
@@ -33,6 +33,7 @@ struct PPB_BufferTrusted;
 struct PPB_Context3DTrusted_Dev;
 struct PPB_FileChooserTrusted;
 struct PPB_FileIOTrusted;
+struct PPB_Flash_Clipboard;
 struct PPB_Flash_Menu;
 struct PPB_Flash_NetConnector;
 struct PPB_Flash_TCPSocket;
@@ -59,6 +60,7 @@ PPAPI_THUNK_EXPORT const PPB_Context3DTrusted_Dev*
 PPAPI_THUNK_EXPORT const PPB_FileChooserTrusted*
     GetPPB_FileChooser_Trusted_Thunk();
 PPAPI_THUNK_EXPORT const PPB_FileIOTrusted* GetPPB_FileIOTrusted_Thunk();
+PPAPI_THUNK_EXPORT const PPB_Flash_Clipboard* GetPPB_Flash_Clipboard_Thunk();
 PPAPI_THUNK_EXPORT const PPB_Flash_Menu* GetPPB_Flash_Menu_Thunk();
 PPAPI_THUNK_EXPORT const PPB_Flash_NetConnector*
     GetPPB_Flash_NetConnector_Thunk();