this script + some grunt approximates the work:

    s/Evolution_MessageList/GNOME_Evolution_MessageList/g;
    s/GNOME_Evolution_MessageList_select_message/GNOME_Evolution_MessageList_selectMessage/g;
    s/GNOME_Evolution_MessageList_open_message/GNOME_Evolution_MessageList_openMessage/g;

    s/Evolution_Folder([ \t])/GNOME_Evolution_Folder$1/g;
    s/Evolution_FolderTypeList/GNOME_Evolution_FolderTypeList/g;
    s/Evolution_FolderBrowser/GNOME_Evolution_FolderBrowser/g;
    s/GNOME_Evolution_FolderBrowser_get_message_list/GNOME_Evolution_FolderBrowser_getMessageList/g;

    s/Evolution_LocalStorage/GNOME_Evolution_LocalStorage/g;
    s/GNOME_Evolution_LocalStorage_update_folder/GNOME_Evolution_LocalStorage_updateFolder/g;

    s/Evolution_ShellView/GNOME_Evolution_ShellView/g;
    s/GNOME_Evolution_ShellView_set_message/GNOME_Evolution_ShellView_setMessage/g;
    s/GNOME_Evolution_ShellView_unset_message/GNOME_Evolution_ShellView_unsetMessage/g...