Update {virtual,override,final} for chrome/ to follow C++11 style.

chrome/browser/plugins/plugin_installer_unittest.cc

Index: chrome/browser/plugins/plugin_installer_unittest.cc
diff --git a/chrome/browser/plugins/plugin_installer_unittest.cc b/chrome/browser/plugins/plugin_installer_unittest.cc
index e7846540c404d4b18ecb6919819a97f5cb563c4b..8a123a718df79a0de75a1e3c3c2c8f226242b928 100644
--- a/chrome/browser/plugins/plugin_installer_unittest.cc
+++ b/chrome/browser/plugins/plugin_installer_unittest.cc
@@ -21,8 +21,8 @@ namespace {
 class PluginInstallerTest : public ChromeRenderViewHostTestHarness {
  public:
   PluginInstallerTest();
-  virtual void SetUp() override;
-  virtual void TearDown() override;
+  void SetUp() override;
+  void TearDown() override;
 
   PluginInstaller* installer() { return installer_.get(); }