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

chrome/browser/browser_process_impl.h

Index: chrome/browser/browser_process_impl.h
diff --git a/chrome/browser/browser_process_impl.h b/chrome/browser/browser_process_impl.h
index 55b9dc2cf02cc29905e7923b3e4c75a4f1620749..0550ad9d666ed8edba3d4c1d035b8ce82788a929 100644
--- a/chrome/browser/browser_process_impl.h
+++ b/chrome/browser/browser_process_impl.h
@@ -73,6 +73,16 @@ class BrowserProcessImpl : public BrowserProcess, public NonThreadSafe {
     return db_thread_.get();
   }
 
+#if defined(OS_LINUX)
+  virtual base::Thread* background_x11_thread() {
+    DCHECK(CalledOnValidThread());
+    // The BACKGROUND_X11 thread is created when the IO thread is created.
+    if (!created_io_thread_)
+      CreateIOThread();
+    return background_x11_thread_.get();
+  }
+#endif
+
   virtual ProfileManager* profile_manager() {
     DCHECK(CalledOnValidThread());
     if (!created_profile_manager_)
@@ -211,6 +221,10 @@ class BrowserProcessImpl : public BrowserProcess, public NonThreadSafe {
 
   bool created_io_thread_;
   scoped_ptr<base::Thread> io_thread_;
+#if defined(OS_LINUX)
+  // This shares a created flag with the IO thread.
+  scoped_ptr<base::Thread> background_x11_thread_;
+#endif
 
   bool created_file_thread_;
   scoped_ptr<base::Thread> file_thread_;