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

content/browser/appcache/appcache_service_unittest.cc

Index: content/browser/appcache/appcache_service_unittest.cc
diff --git a/content/browser/appcache/appcache_service_unittest.cc b/content/browser/appcache/appcache_service_unittest.cc
index 28e68a6e7188c0e294f7a310336d6dbb5f05815c..b3532f5a25a07472c0e0879bb3f791641a0e9fe0 100644
--- a/content/browser/appcache/appcache_service_unittest.cc
+++ b/content/browser/appcache/appcache_service_unittest.cc
@@ -38,8 +38,8 @@ class MockResponseReader : public AppCacheResponseReader {
         info_(info), info_size_(info_size),
         data_(data), data_size_(data_size) {
   }
-  virtual void ReadInfo(HttpResponseInfoIOBuffer* info_buf,
-                        const net::CompletionCallback& callback) override {
+  void ReadInfo(HttpResponseInfoIOBuffer* info_buf,
+                const net::CompletionCallback& callback) override {
     info_buffer_ = info_buf;
     callback_ = callback;  // Cleared on completion.
 
@@ -48,8 +48,9 @@ class MockResponseReader : public AppCacheResponseReader {
     info_buffer_->response_data_size = data_size_;
     ScheduleUserCallback(rv);
   }
-  virtual void ReadData(net::IOBuffer* buf, int buf_len,
-                        const net::CompletionCallback& callback) override {
+  void ReadData(net::IOBuffer* buf,
+                int buf_len,
+                const net::CompletionCallback& callback) override {
     buffer_ = buf;
     buffer_len_ = buf_len;
     callback_ = callback;  // Cleared on completion.