Apply automated fixits for Chrome clang plugin to sandbox.

sandbox/win/src/win2k_threadpool.h

Index: sandbox/win/src/win2k_threadpool.h
diff --git a/sandbox/win/src/win2k_threadpool.h b/sandbox/win/src/win2k_threadpool.h
index 41cd5f13b711dd0539c367c3dcc007bf041ef846..be2791f309b33ec9a0e3b1e44688cfc92d0cf1b1 100644
--- a/sandbox/win/src/win2k_threadpool.h
+++ b/sandbox/win/src/win2k_threadpool.h
@@ -25,13 +25,14 @@ namespace sandbox {
 class Win2kThreadPool : public ThreadProvider {
  public:
   Win2kThreadPool();
-  virtual ~Win2kThreadPool();
+  ~Win2kThreadPool() override;
 
-  virtual bool RegisterWait(const void* cookie, HANDLE waitable_object,
-                            CrossCallIPCCallback callback,
-                            void* context);
+  bool RegisterWait(const void* cookie,
+                    HANDLE waitable_object,
+                    CrossCallIPCCallback callback,
+                    void* context) override;
 
-  virtual bool UnRegisterWaits(void* cookie);
+  bool UnRegisterWaits(void* cookie) override;
 
   // Returns the total number of wait objects associated with
   // the thread pool.