Update {virtual,override,final} to follow C++11 style.

chrome/browser/android/logo_bridge.cc

Index: chrome/browser/android/logo_bridge.cc
diff --git a/chrome/browser/android/logo_bridge.cc b/chrome/browser/android/logo_bridge.cc
index b673ebcad46eec692c6fab0607dde748b028c3f3..6c97a0436e044261f7e11e971b69e2df1ee295c9 100644
--- a/chrome/browser/android/logo_bridge.cc
+++ b/chrome/browser/android/logo_bridge.cc
@@ -53,11 +53,11 @@ class LogoObserverAndroid : public search_provider_logos::LogoObserver {
     j_logo_observer_.Reset(env, j_logo_observer);
   }
 
-  virtual ~LogoObserverAndroid() {}
+  ~LogoObserverAndroid() override {}
 
   // seach_provider_logos::LogoObserver:
-  virtual void OnLogoAvailable(const search_provider_logos::Logo* logo,
-                               bool from_cache) override {
+  void OnLogoAvailable(const search_provider_logos::Logo* logo,
+                       bool from_cache) override {
     if (!logo_bridge_)
       return;
 
@@ -67,9 +67,7 @@ class LogoObserverAndroid : public search_provider_logos::LogoObserver {
         env, j_logo_observer_.obj(), j_logo.obj(), from_cache);
   }
 
-  virtual void OnObserverRemoved() override {
-    delete this;
-  }
+  void OnObserverRemoved() override { delete this; }
 
  private:
   // The associated LogoBridge. We won't call back to Java if the LogoBridge has