Restructure sandbox code to reduce dependencies pulled in by intercept code.

sandbox/win/src/sandbox_utils.h

Index: sandbox/win/src/sandbox_utils.h
diff --git a/sandbox/win/src/sandbox_utils.h b/sandbox/win/src/sandbox_utils.h
index 78e76fbc733b390bcb4875f358b2adecaaa34989..9a906754f1e0a58236096b4bff5e42e3776ca2c5 100644
--- a/sandbox/win/src/sandbox_utils.h
+++ b/sandbox/win/src/sandbox_utils.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 SANDBOX_SRC_SANDBOX_UTILS_H__
-#define SANDBOX_SRC_SANDBOX_UTILS_H__
+#ifndef SANDBOX_SRC_SANDBOX_UTILS_H_
+#define SANDBOX_SRC_SANDBOX_UTILS_H_
 
 #include <windows.h>
 #include <string>
@@ -22,6 +22,6 @@ void InitObjectAttribs(const std::wstring& name,
                        OBJECT_ATTRIBUTES* obj_attr,
                        UNICODE_STRING* uni_name);
 
-};  // namespace sandbox
+}  // namespace sandbox
 
-#endif  // SANDBOX_SRC_SANDBOX_UTILS_H__
+#endif  // SANDBOX_SRC_SANDBOX_UTILS_H_