Update {virtual,override} to follow C++11 style in remoting.

remoting/base/breakpad_win_unittest.cc

Index: remoting/base/breakpad_win_unittest.cc
diff --git a/remoting/base/breakpad_win_unittest.cc b/remoting/base/breakpad_win_unittest.cc
index da554b26fe6ba5ac2769d9d473d1072f5fe66d50..78ab02ab198f6fd5fe4310084ee7a01e59775efe 100644
--- a/remoting/base/breakpad_win_unittest.cc
+++ b/remoting/base/breakpad_win_unittest.cc
@@ -69,9 +69,9 @@ void InitializeCrashReportingForTest(const wchar_t* pipe_name);
 class BreakpadWinDeathTest : public testing::Test {
  public:
   BreakpadWinDeathTest();
-  virtual ~BreakpadWinDeathTest();
+  ~BreakpadWinDeathTest() override;
 
-  virtual void SetUp() override;
+  void SetUp() override;
 
  protected:
   scoped_ptr<google_breakpad::CrashGenerationServer> crash_server_;