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

android_webview/native/aw_contents_client_bridge.h

Index: android_webview/native/aw_contents_client_bridge.h
diff --git a/android_webview/native/aw_contents_client_bridge.h b/android_webview/native/aw_contents_client_bridge.h
index d50fa62911183666495b45151cbc0c4c88af58bb..2a5caba0bba5dd6dceba670b6da8e2b9533d4a10 100644
--- a/android_webview/native/aw_contents_client_bridge.h
+++ b/android_webview/native/aw_contents_client_bridge.h
@@ -30,31 +30,31 @@ namespace android_webview {
 class AwContentsClientBridge : public AwContentsClientBridgeBase {
  public:
   AwContentsClientBridge(JNIEnv* env, jobject obj);
-  virtual ~AwContentsClientBridge();
+  ~AwContentsClientBridge() override;
 
   // AwContentsClientBridgeBase implementation
-  virtual void AllowCertificateError(int cert_error,
-                                     net::X509Certificate* cert,
-                                     const GURL& request_url,
-                                     const base::Callback<void(bool)>& callback,
-                                     bool* cancel_request) override;
-  virtual void SelectClientCertificate(
+  void AllowCertificateError(int cert_error,
+                             net::X509Certificate* cert,
+                             const GURL& request_url,
+                             const base::Callback<void(bool)>& callback,
+                             bool* cancel_request) override;
+  void SelectClientCertificate(
       net::SSLCertRequestInfo* cert_request_info,
       const SelectCertificateCallback& callback) override;
 
-  virtual void RunJavaScriptDialog(
+  void RunJavaScriptDialog(
       content::JavaScriptMessageType message_type,
       const GURL& origin_url,
       const base::string16& message_text,
       const base::string16& default_prompt_text,
       const content::JavaScriptDialogManager::DialogClosedCallback& callback)
       override;
-  virtual void RunBeforeUnloadDialog(
+  void RunBeforeUnloadDialog(
       const GURL& origin_url,
       const base::string16& message_text,
       const content::JavaScriptDialogManager::DialogClosedCallback& callback)
       override;
-  virtual bool ShouldOverrideUrlLoading(const base::string16& url) override;
+  bool ShouldOverrideUrlLoading(const base::string16& url) override;
 
   // Methods called from Java.
   void ProceedSslError(JNIEnv* env, jobject obj, jboolean proceed, jint id);