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

chrome/common/safe_browsing/pe_image_reader_win_unittest.cc

Index: chrome/common/safe_browsing/pe_image_reader_win_unittest.cc
diff --git a/chrome/common/safe_browsing/pe_image_reader_win_unittest.cc b/chrome/common/safe_browsing/pe_image_reader_win_unittest.cc
index d0a208be095a496ebf55910e9948cb5707277a4b..939e7a6474b8c669d8c4485ef979c3dc6c73ccb9 100644
--- a/chrome/common/safe_browsing/pe_image_reader_win_unittest.cc
+++ b/chrome/common/safe_browsing/pe_image_reader_win_unittest.cc
@@ -35,7 +35,7 @@ class PeImageReaderTest : public testing::TestWithParam<const TestData*> {
  protected:
   PeImageReaderTest() : expected_data_(GetParam()) {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &data_file_path_));
     data_file_path_ = data_file_path_.AppendASCII("safe_browsing");
     data_file_path_ = data_file_path_.AppendASCII(expected_data_->filename);