RunSpeech Dispatcher in multi threaded mode.

chrome/browser/speech/tts_linux.cc

Index: chrome/browser/speech/tts_linux.cc
diff --git a/chrome/browser/speech/tts_linux.cc b/chrome/browser/speech/tts_linux.cc
index 1ede2b3d22035409cdff7c6467181a1c4a7a1239..05360b1868aa05a8b6df55abf60a3eea31d80321 100644
--- a/chrome/browser/speech/tts_linux.cc
+++ b/chrome/browser/speech/tts_linux.cc
@@ -116,7 +116,7 @@ void TtsPlatformImplLinux::Initialize() {
     // http://crbug.com/317360
     ANNOTATE_SCOPED_MEMORY_LEAK;
     conn_ = libspeechd_loader_.spd_open(
-        "chrome", "extension_api", NULL, SPD_MODE_SINGLE);
+        "chrome", "extension_api", NULL, SPD_MODE_THREADED);
   }
   if (!conn_)
     return;
@@ -151,7 +151,7 @@ void TtsPlatformImplLinux::Reset() {
   if (conn_)
     libspeechd_loader_.spd_close(conn_);
   conn_ = libspeechd_loader_.spd_open(
-      "chrome", "extension_api", NULL, SPD_MODE_SINGLE);
+      "chrome", "extension_api", NULL, SPD_MODE_THREADED);
 }
 
 bool TtsPlatformImplLinux::PlatformImplAvailable() {