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

android_webview/native/input_stream_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef ANDROID_WEBVIEW_NATIVE_INPUT_STREAM_H_
 #define ANDROID_WEBVIEW_NATIVE_INPUT_STREAM_H_
 
 #include "android_webview/browser/input_stream.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/compiler_specific.h"
 
 namespace net {
 class IOBuffer;
 }
 
 namespace android_webview {
 
 class InputStreamImpl : public InputStream {
  public:
   // Maximum size of |buffer_|.
   static const int kBufferSize;
 
   static const InputStreamImpl* FromInputStream(
       const InputStream* input_stream);
 
   // |stream| should be an instance of the InputStream Java class.
   // |stream| can't be null.
   InputStreamImpl(const base::android::JavaRef<jobject>& stream);
-  virtual ~InputStreamImpl();
+  ~InputStreamImpl() override;
 
   // Gets the underlying Java object. Guaranteed non-NULL.
   const jobject jobj() const { return jobject_.obj(); }
 
   // InputStream implementation.
-  virtual bool BytesAvailable(int* bytes_available) const override;
-  virtual bool Skip(int64_t n, int64_t* bytes_skipped) override;
-  virtual bool Read(net::IOBuffer* dest, int length, int* bytes_read) override;
+  bool BytesAvailable(int* bytes_available) const override;
+  bool Skip(int64_t n, int64_t* bytes_skipped) override;
+  bool Read(net::IOBuffer* dest, int length, int* bytes_read) override;
+
  protected:
   // Parameterless constructor exposed for testing.
   InputStreamImpl();
 
  private:
   base::android::ScopedJavaGlobalRef<jobject> jobject_;
   base::android::ScopedJavaGlobalRef<jbyteArray> buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(InputStreamImpl);
 };
 
 bool RegisterInputStream(JNIEnv* env);
 
 } // namespace android_webview
 
 #endif //  ANDROID_WEBVIEW_NATIVE_INPUT_STREAM_H_