Standardize usage of virtual/override/final in content/

content/test/plugin/plugin_thread_async_call_test.h

Index: content/test/plugin/plugin_thread_async_call_test.h
diff --git a/content/test/plugin/plugin_thread_async_call_test.h b/content/test/plugin/plugin_thread_async_call_test.h
index 2840e32927a876e38faebfa79366ed81b5f0907d..06c13f5dfe3ebeb5f46694d2ac7571d36f4c97af 100644
--- a/content/test/plugin/plugin_thread_async_call_test.h
+++ b/content/test/plugin/plugin_thread_async_call_test.h
@@ -18,12 +18,15 @@ namespace NPAPIClient {
 class PluginThreadAsyncCallTest : public PluginTest {
  public:
   PluginThreadAsyncCallTest(NPP id, NPNetscapeFuncs *host_functions);
-  virtual ~PluginThreadAsyncCallTest();
+  ~PluginThreadAsyncCallTest() override;
 
-  virtual NPError New(uint16 mode, int16 argc, const char* argn[],
-                      const char* argv[], NPSavedData* saved) override;
+  NPError New(uint16 mode,
+              int16 argc,
+              const char* argn[],
+              const char* argv[],
+              NPSavedData* saved) override;
 
-  virtual NPError Destroy() override;
+  NPError Destroy() override;
 
   void AsyncCall();
   void OnCallSucceeded();