Standardize usage of virtual/override/final specifiers.

content/browser/frame_host/navigation_controller_impl_unittest.cc

Index: content/browser/frame_host/navigation_controller_impl_unittest.cc
diff --git a/content/browser/frame_host/navigation_controller_impl_unittest.cc b/content/browser/frame_host/navigation_controller_impl_unittest.cc
index a1d14ca270278b854b097c866f890a0aa910fd90..89644afcc5ef6fc9cdf5d0b514820dbb2956e82d 100644
--- a/content/browser/frame_host/navigation_controller_impl_unittest.cc
+++ b/content/browser/frame_host/navigation_controller_impl_unittest.cc
@@ -185,7 +185,7 @@ class NavigationControllerTest
   NavigationControllerTest() : navigation_entry_committed_counter_(0) {
   }
 
-  virtual void SetUp() override {
+  void SetUp() override {
     RenderViewHostImplTestHarness::SetUp();
     WebContents* web_contents = RenderViewHostImplTestHarness::web_contents();
     ASSERT_TRUE(web_contents);  // The WebContents should be created by now.