Run SPD in a single-threaded mode.

chrome/browser/speech/tts_linux.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 <math.h>
 
 #include <map>
 
 #include "base/debug/leak_annotations.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 92 matching lines @@
   base::AutoLock lock(initialization_lock_);
 
   if (!libspeechd_loader_.Load("libspeechd.so.2"))
     return;
 
   {
     // spd_open has memory leaks which are hard to suppress.
     // http://crbug.com/317360
     ANNOTATE_SCOPED_MEMORY_LEAK;
     conn_ = libspeechd_loader_.spd_open(
-        "chrome", "extension_api", NULL, SPD_MODE_THREADED);
+        "chrome", "extension_api", NULL, SPD_MODE_SINGLE);
   }
   if (!conn_)
     return;
 
   // Register callbacks for all events.
   conn_->callback_begin =
     conn_->callback_end =
     conn_->callback_cancel =
     conn_->callback_pause =
     conn_->callback_resume =
@@ skipping 14 matching lines @@
     libspeechd_loader_.spd_close(conn_);
     conn_ = NULL;
   }
 }
 
 void TtsPlatformImplLinux::Reset() {
   base::AutoLock lock(initialization_lock_);
   if (conn_)
     libspeechd_loader_.spd_close(conn_);
   conn_ = libspeechd_loader_.spd_open(
-      "chrome", "extension_api", NULL, SPD_MODE_THREADED);
+      "chrome", "extension_api", NULL, SPD_MODE_SINGLE);
 }
 
 bool TtsPlatformImplLinux::PlatformImplAvailable() {
   if (!initialization_lock_.Try())
     return false;
   bool result = libspeechd_loader_.loaded() && (conn_ != NULL);
   initialization_lock_.Release();
   return result;
 }
 
@@ skipping 178 matching lines @@
 // static
 TtsPlatformImplLinux* TtsPlatformImplLinux::GetInstance() {
   return Singleton<TtsPlatformImplLinux,
                    LeakySingletonTraits<TtsPlatformImplLinux> >::get();
 }
 
 // static
 TtsPlatformImpl* TtsPlatformImpl::GetInstance() {
   return TtsPlatformImplLinux::GetInstance();
 }