Move the code in libcros' chromeos_speech_synthesis.cc into Chrome

chrome/browser/chromeos/dbus/dbus_thread_manager.h

Index: chrome/browser/chromeos/dbus/dbus_thread_manager.h
diff --git a/chrome/browser/chromeos/dbus/dbus_thread_manager.h b/chrome/browser/chromeos/dbus/dbus_thread_manager.h
index 889778fb62f9c483c06956164c84abb3337848f3..dc64f0ec1a10d2374658b7a109729b9ab9b337aa 100644
--- a/chrome/browser/chromeos/dbus/dbus_thread_manager.h
+++ b/chrome/browser/chromeos/dbus/dbus_thread_manager.h
@@ -22,6 +22,7 @@ namespace chromeos {
 class CrosDBusService;
 class PowerManagerClient;
 class SensorsSource;
+class SpeechSynthesizerClient;
 
 // DBusThreadManager manages the D-Bus thread, the thread dedicated to
 // handling asynchronous D-Bus operations.
@@ -61,6 +62,13 @@ class DBusThreadManager {
     return power_manager_client_.get();
   }
 
+  // Returns the speech synthesizer client, owned by DBusThreadManager.
+  // Do not cache this pointer and use it after DBusThreadManager is shut
+  // down.
+  SpeechSynthesizerClient* speech_synthesizer_client() {
+    return speech_synthesizer_client_.get();
+  }
+
  private:
   DBusThreadManager();
   virtual ~DBusThreadManager();
@@ -70,6 +78,7 @@ class DBusThreadManager {
   CrosDBusService* cros_dbus_service_;
   scoped_ptr<SensorsSource> sensors_source_;
   scoped_ptr<PowerManagerClient> power_manager_client_;
+  scoped_ptr<SpeechSynthesizerClient> speech_synthesizer_client_;
 
   DISALLOW_COPY_AND_ASSIGN(DBusThreadManager);
 };