Fix virtual/override/final usage in Source/bindings/.

Source/bindings/core/v8/ScriptStreamer.cpp

 // 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 "config.h"
 #include "bindings/core/v8/ScriptStreamer.h"
 
 #include "bindings/core/v8/ScriptStreamerThread.h"
 #include "bindings/core/v8/V8ScriptRunner.h"
 #include "core/dom/Document.h"
@@ skipping 154 matching lines @@
     SourceStream()
         : v8::ScriptCompiler::ExternalSourceStream()
         , m_cancelled(false)
         , m_finished(false)
         , m_queueLeadPosition(0)
         , m_queueTailPosition(0)
         , m_bookmarkPosition(0)
     {
     }
 
-    virtual ~SourceStream() { }
+    virtual ~SourceStream() override { }
 
     // Called by V8 on a background thread. Should block until we can return
     // some data.
-    virtual size_t GetMoreData(const uint8_t** src) override
+    size_t GetMoreData(const uint8_t** src) override
     {
         ASSERT(!isMainThread());
         {
             MutexLocker locker(m_mutex);
             if (m_cancelled)
                 return 0;
         }
         size_t length = 0;
         // This will wait until there is data.
         m_dataQueue.consume(src, &length);
         {
             MutexLocker locker(m_mutex);
             if (m_cancelled)
                 return 0;
         }
         m_queueLeadPosition += length;
         return length;
     }
 
     // Called by V8 on background thread.
-    virtual bool SetBookmark() override
+    bool SetBookmark() override
     {
         ASSERT(!isMainThread());
         m_bookmarkPosition = m_queueLeadPosition;
         return m_bookmarkPosition != 0; // Don't mess with BOM.
     }
 
     // Called by V8 on background thread.
-    virtual void ResetToBookmark() override
+    void ResetToBookmark() override
     {
         ASSERT(!isMainThread());
         {
             MutexLocker locker(m_mutex);
             m_queueLeadPosition = m_bookmarkPosition;
             m_queueTailPosition = m_bookmarkPosition;
             m_dataQueue.clear();
         }
 
         // Inform main thread to re-queue the data.
@@ skipping 423 matching lines @@
 
     // The Resource might go out of scope if the script is no longer
     // needed. This makes PendingScript notify the ScriptStreamer when it is
     // destroyed.
     script.setStreamer(ScriptStreamer::create(resource, scriptType, scriptState, compileOption));
 
     return true;
 }
 
 } // namespace blink