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

chrome/test/testing_browser_process.h

 // Copyright (c) 2006-2008 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.
 
 // An implementation of BrowserProcess for unit tests that fails for most
 // services. By preventing creation of services, we reduce dependencies and
 // keep the profile clean. Clients of this class must handle the NULL return
 // value, however.
 
 #ifndef CHROME_TEST_TESTING_BROWSER_PROCESS_H_
@@ skipping 26 matching lines @@
   }
 
   virtual MetricsService* metrics_service() {
     return NULL;
   }
 
   virtual base::Thread* io_thread() {
     return NULL;
   }
 
+#if defined(OS_LINUX)
+  virtual base::Thread* background_x11_thread() {
+    return NULL;
+  }
+#endif
+
   virtual base::Thread* file_thread() {
     return NULL;
   }
 
   virtual base::Thread* db_thread() {
     return NULL;
   }
 
   virtual ProfileManager* profile_manager() {
     return NULL;
@@ skipping 79 matching lines @@
 
  private:
   NotificationService notification_service_;
   scoped_ptr<base::WaitableEvent> shutdown_event_;
   scoped_ptr<ClipboardService> clipboard_service_;
 
   DISALLOW_COPY_AND_ASSIGN(TestingBrowserProcess);
 };
 
 #endif  // CHROME_TEST_TESTING_BROWSER_PROCESS_H_