Add the "virtual" keyword on method overrides that are missing it.

chrome/renderer/renderer_webidbobjectstore_impl.h

 // Copyright (c) 2010 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 CHROME_RENDERER_RENDERER_WEBIDBOBJECTSTORE_IMPL_H_
 #define CHROME_RENDERER_RENDERER_WEBIDBOBJECTSTORE_IMPL_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebIDBCallbacks.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebIDBObjectStore.h"
 
 namespace WebKit {
 class WebFrame;
 class WebIDBCallbacks;
 class WebIDBIndex;
 class WebIDBKey;
 class WebIDBKeyRange;
 class WebString;
 }
 
 class RendererWebIDBObjectStoreImpl : public WebKit::WebIDBObjectStore {
  public:
   explicit RendererWebIDBObjectStoreImpl(int32 idb_object_store_id);
   ~RendererWebIDBObjectStoreImpl();
 
   // WebKit::WebIDBObjectStore
-  WebKit::WebString name() const;
-  WebKit::WebString keyPath() const;
-  WebKit::WebDOMStringList indexNames() const;
+  virtual WebKit::WebString name() const;
+  virtual WebKit::WebString keyPath() const;
+  virtual WebKit::WebDOMStringList indexNames() const;
 
-  void get(const WebKit::WebIDBKey& key,
-           WebKit::WebIDBCallbacks* callbacks,
-           const WebKit::WebIDBTransaction& transaction,
-           WebKit::WebExceptionCode& ec);
-  void put(const WebKit::WebSerializedScriptValue& value,
-           const WebKit::WebIDBKey& key,
-           bool add_only,
-           WebKit::WebIDBCallbacks* callbacks,
-           const WebKit::WebIDBTransaction& transaction,
-           WebKit::WebExceptionCode& ec);
-  void deleteFunction(const WebKit::WebIDBKey& key,
-                      WebKit::WebIDBCallbacks* callbacks,
-                      const WebKit::WebIDBTransaction& transaction,
-                      WebKit::WebExceptionCode& ec);
+  virtual void get(const WebKit::WebIDBKey& key,
+                   WebKit::WebIDBCallbacks* callbacks,
+                   const WebKit::WebIDBTransaction& transaction,
+                   WebKit::WebExceptionCode& ec);
+  virtual void put(const WebKit::WebSerializedScriptValue& value,
+                   const WebKit::WebIDBKey& key,
+                   bool add_only,
+                   WebKit::WebIDBCallbacks* callbacks,
+                   const WebKit::WebIDBTransaction& transaction,
+                   WebKit::WebExceptionCode& ec);
+  virtual void deleteFunction(const WebKit::WebIDBKey& key,
+                              WebKit::WebIDBCallbacks* callbacks,
+                              const WebKit::WebIDBTransaction& transaction,
+                              WebKit::WebExceptionCode& ec);
 
-  WebKit::WebIDBIndex* createIndex(
+  virtual WebKit::WebIDBIndex* createIndex(
       const WebKit::WebString& name,
       const WebKit::WebString& key_path,
       bool unique,
       const WebKit::WebIDBTransaction& transaction,
       WebKit::WebExceptionCode& ec);
   // Transfers ownership of the WebIDBIndex to the caller.
-  WebKit::WebIDBIndex* index(const WebKit::WebString& name,
-                             WebKit::WebExceptionCode& ec);
-  void deleteIndex(const WebKit::WebString& name,
-                   const WebKit::WebIDBTransaction& transaction,
-                   WebKit::WebExceptionCode& ec);
+  virtual WebKit::WebIDBIndex* index(const WebKit::WebString& name,
+                                     WebKit::WebExceptionCode& ec);
+  virtual void deleteIndex(const WebKit::WebString& name,
+                           const WebKit::WebIDBTransaction& transaction,
+                           WebKit::WebExceptionCode& ec);
 
-  void openCursor(const WebKit::WebIDBKeyRange& idb_key_range,
+  virtual void openCursor(const WebKit::WebIDBKeyRange& idb_key_range,
                   unsigned short direction,
                   WebKit::WebIDBCallbacks* callbacks,
                   const WebKit::WebIDBTransaction& transaction,
                   WebKit::WebExceptionCode& ec);
  private:
   int32 idb_object_store_id_;
 };
 
 #endif  // CHROME_RENDERER_RENDERER_WEBIDBOBJECTSTORE_IMPL_H_