Standardize usage of virtual/override/final in content/browser/

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 0b93ab0c94197a605d5972199ef9a0bd529853da..3a928105026cce4e6fe8adfbdecee39f15425c5e 100644
--- a/content/browser/streams/stream_unittest.cc
+++ b/content/browser/streams/stream_unittest.cc
@@ -43,7 +43,7 @@ class TestStreamReader : public StreamReadObserver {
  public:
   TestStreamReader() : buffer_(new net::GrowableIOBuffer()), completed_(false) {
   }
-  virtual ~TestStreamReader() {}
+  ~TestStreamReader() override {}
 
   void Read(Stream* stream) {
     const size_t kBufferSize = 32768;
@@ -76,9 +76,7 @@ class TestStreamReader : public StreamReadObserver {
     }
   }
 
-  virtual void OnDataAvailable(Stream* stream) override {
-    Read(stream);
-  }
+  void OnDataAvailable(Stream* stream) override { Read(stream); }
 
   scoped_refptr<net::GrowableIOBuffer> buffer() { return buffer_; }
 
@@ -94,7 +92,7 @@ class TestStreamReader : public StreamReadObserver {
 class TestStreamWriter : public StreamWriteObserver {
  public:
   TestStreamWriter() {}
-  virtual ~TestStreamWriter() {}
+  ~TestStreamWriter() override {}
 
   void Write(Stream* stream,
              scoped_refptr<net::IOBuffer> buffer,
@@ -102,11 +100,9 @@ class TestStreamWriter : public StreamWriteObserver {
     stream->AddData(buffer, buffer_size);
   }
 
-  virtual void OnSpaceAvailable(Stream* stream) override {
-  }
+  void OnSpaceAvailable(Stream* stream) override {}
 
-  virtual void OnClose(Stream* stream) override {
-  }
+  void OnClose(Stream* stream) override {}
 };
 
 TEST_F(StreamTest, SetReadObserver) {