wm: Update namespace and header define guards.

src/platform/window_manager/mock_x_connection.h

Index: src/platform/window_manager/mock_x_connection.h
diff --git a/src/platform/window_manager/mock_x_connection.h b/src/platform/window_manager/mock_x_connection.h
index 6563ddc922a673c6c1a97d2018bbca34470de44f..993930b18c8e57b8eb6860788ab0e48293b1e08b 100644
--- a/src/platform/window_manager/mock_x_connection.h
+++ b/src/platform/window_manager/mock_x_connection.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef __PLATFORM_WINDOW_MANAGER_MOCK_X_CONNECTION_H__
-#define __PLATFORM_WINDOW_MANAGER_MOCK_X_CONNECTION_H__
+#ifndef WINDOW_MANAGER_MOCK_X_CONNECTION_H_
+#define WINDOW_MANAGER_MOCK_X_CONNECTION_H_
 
 #include <tr1/memory>
 #include <string>
@@ -12,7 +12,7 @@
 
 #include "window_manager/x_connection.h"
 
-namespace chromeos {
+namespace window_manager {
 
 // This is a fake implementation of a connection to an X server.
 class MockXConnection : public XConnection {
@@ -199,6 +199,6 @@ class MockXConnection : public XConnection {
   DISALLOW_COPY_AND_ASSIGN(MockXConnection);
 };
 
-}  // namespace chromeos
+}  // namespace window_manager
 
 #endif