[NaCl SDK] ppapi_simple: Allow initial terminal size to to be set on startup.

native_client_sdk/src/libraries/nacl_io/mount_node_tty.cc

 // Copyright (c) 2013 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 "nacl_io/mount_node_tty.h"
 
 #include <assert.h>
 #include <errno.h>
 #include <signal.h>
 #include <stdio.h>
@@ skipping 239 matching lines @@
       // This ioctl is used to deliver data from the user to this tty node's
       // input buffer.
       struct tioc_nacl_input_string* message =
         va_arg(args, struct tioc_nacl_input_string*);
       return ProcessInput(message);
     }
     case TIOCSWINSZ: {
       struct winsize* size = va_arg(args, struct winsize*);
       {
         AUTO_LOCK(node_lock_);
+        if (rows_ == size->ws_row && cols_ == size->ws_col)
+          return 0;
         rows_ = size->ws_row;
         cols_ = size->ws_col;
       }
       kill(getpid(), SIGWINCH);
       {
         // Wake up any thread waiting on Read with POLLERR then immediate
         // clear it to signal EINTR.
         AUTO_LOCK(emitter_->GetLock())
         emitter_->RaiseEvents_Locked(POLLERR);
         emitter_->ClearEvents_Locked(POLLERR);
@@ skipping 18 matching lines @@
 }
 
 Error MountNodeTty::Tcsetattr(int optional_actions,
                          const struct termios *termios_p) {
   AUTO_LOCK(node_lock_);
   termios_ = *termios_p;
   return 0;
 }
 
 }