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

content/browser/android/java/jni_helper_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/android/java/jni_helper.h"
 
 #include "base/android/jni_android.h"
 #include "base/at_exit.h"
 #include "base/logging.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 20 matching lines @@
   g_last_jni_signature = jni_signature;
   g_last_method_id = g_previous_functions->GetMethodID(env, clazz, method,
                                                        jni_signature);
   return g_last_method_id;
 }
 
 }  // namespace
 
 class JNIAndroidTest : public testing::Test {
  protected:
-  virtual void SetUp() {
+  void SetUp() override {
     JNIEnv* env = base::android::AttachCurrentThread();
     g_previous_functions = env->functions;
     hooked_functions = *g_previous_functions;
     env->functions = &hooked_functions;
     hooked_functions.GetMethodID = &GetMethodIDWrapper;
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     JNIEnv* env = base::android::AttachCurrentThread();
     env->functions = g_previous_functions;
     Reset();
   }
 
   void Reset() {
     g_last_method = 0;
     g_last_jni_signature = 0;
     g_last_method_id = NULL;
   }
@@ skipping 25 matching lines @@
 
   Reset();
   jmethodID id3 = GetMethodIDFromClassName(env, kJavaLangObject, kToString,
                                            kReturningJavaLangString);
   EXPECT_STREQ(kToString, g_last_method);
   EXPECT_STREQ(kReturningJavaLangString, g_last_jni_signature);
   EXPECT_EQ(g_last_method_id, id3);
 }
 
 }  // namespace content