Standardize usage of virtual/override/final specifiers.

content/browser/streams/stream_unittest.cc

Index: content/browser/streams/stream_unittest.cc
diff --git a/content/browser/streams/stream_unittest.cc b/content/browser/streams/stream_unittest.cc
index 3a928105026cce4e6fe8adfbdecee39f15425c5e..e0346e5a76e9525f8376c9dc433a3cacebd0599d 100644
--- a/content/browser/streams/stream_unittest.cc
+++ b/content/browser/streams/stream_unittest.cc
@@ -16,9 +16,7 @@ class StreamTest : public testing::Test {
  public:
   StreamTest() : producing_seed_key_(0) {}
 
-  virtual void SetUp() override {
-    registry_.reset(new StreamRegistry());
-  }
+  void SetUp() override { registry_.reset(new StreamRegistry()); }
 
   // Create a new IO buffer of the given |buffer_size| and fill it with random
   // data.