Add virtual to webkit_glue::WebKitPlatformSupportImpl::parseDataURL since it is

webkit/glue/webkitplatformsupport_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 WEBKIT_PLATFORM_SUPPORT_IMPL_H_
 #define WEBKIT_PLATFORM_SUPPORT_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/debug/trace_event.h"
 #include "base/platform_file.h"
@@ skipping 67 matching lines @@
   virtual size_t lowMemoryUsageMB() OVERRIDE;
   virtual size_t highMemoryUsageMB() OVERRIDE;
   virtual size_t highUsageDeltaMB() OVERRIDE;
 #endif
   virtual bool processMemorySizesInBytes(size_t* private_bytes,
                                          size_t* shared_bytes);
   virtual bool memoryAllocatorWasteInBytes(size_t* size);
   virtual WebKit::WebURLLoader* createURLLoader();
   virtual WebKit::WebSocketStreamHandle* createSocketStreamHandle();
   virtual WebKit::WebString userAgent(const WebKit::WebURL& url);
-  WebKit::WebData parseDataURL(
+  virtual WebKit::WebData parseDataURL(
       const WebKit::WebURL& url, WebKit::WebString& mimetype,
       WebKit::WebString& charset);
   virtual WebKit::WebURLError cancelledError(const WebKit::WebURL& url) const;
   virtual void getPluginList(bool refresh, WebKit::WebPluginListBuilder*);
   virtual void decrementStatsCounter(const char* name);
   virtual void incrementStatsCounter(const char* name);
   virtual void histogramCustomCounts(
     const char* name, int sample, int min, int max, int bucket_count);
   virtual void histogramEnumeration(
     const char* name, int sample, int boundary_value);
@@ skipping 94 matching lines @@
   int shared_timer_suspended_;  // counter
   WebThemeEngineImpl native_theme_engine_;
   WebFallbackThemeEngineImpl fallback_theme_engine_;
   base::ThreadLocalStorage::Slot current_thread_slot_;
   scoped_ptr<FlingCurveConfiguration> fling_curve_configuration_;
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_PLATFORM_SUPPORT_IMPL_H_