Linux: move X operations from the IO to UI2 thread.

chrome/browser/chrome_thread.cc

Index: chrome/browser/chrome_thread.cc
diff --git a/chrome/browser/chrome_thread.cc b/chrome/browser/chrome_thread.cc
index 9c0d10c06db4e4e4d2b3f35122efcd1a90e13ed5..762ae7656414f1a2c5329d09399763b495e613fa 100644
--- a/chrome/browser/chrome_thread.cc
+++ b/chrome/browser/chrome_thread.cc
@@ -9,6 +9,10 @@ static const char* chrome_thread_names[ChromeThread::ID_COUNT] = {
   "Chrome_IOThread",  // IO
   "Chrome_FileThread",  // FILE
   "Chrome_DBThread",  // DB
+  "Chrome_HistoryThread",  // HISTORY
+#if defined(OS_LINUX)
+  "Chrome_Background_X11Thread",  // BACKGROUND_X11
+#endif
 };
 
 Lock ChromeThread::lock_;
@@ -17,6 +21,10 @@ ChromeThread* ChromeThread::chrome_threads_[ID_COUNT] = {
   NULL,  // IO
   NULL,  // FILE
   NULL,  // DB
+  NULL,  // HISTORY
+#if defined(OS_LINUX)
+  NULL,  // BACKGROUND_X11
+#endif
 };
 
 ChromeThread::ChromeThread(ChromeThread::ID identifier)