Standardize usage of virtual/override/final specifiers.

components/dom_distiller/core/distilled_content_store_unittest.cc

Index: components/dom_distiller/core/distilled_content_store_unittest.cc
diff --git a/components/dom_distiller/core/distilled_content_store_unittest.cc b/components/dom_distiller/core/distilled_content_store_unittest.cc
index dced36435a9ef515732475ec87163622e8a18934..b4b7a3de3a4cee1d704d616a1deb52604f028917 100644
--- a/components/dom_distiller/core/distilled_content_store_unittest.cc
+++ b/components/dom_distiller/core/distilled_content_store_unittest.cc
@@ -59,7 +59,7 @@ class InMemoryContentStoreTest : public testing::Test {
 
  protected:
   // testing::Test implementation:
-  virtual void SetUp() override {
+  void SetUp() override {
     store_.reset(new InMemoryContentStore(kDefaultMaxNumCachedEntries));
     save_success_ = false;
     load_success_ = false;