Fix an unitialized read in a unit test to appease valgrind

webkit/glue/media/buffered_data_source.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 WEBKIT_GLUE_MEDIA_BUFFERED_DATA_SOURCE_H_
 #define WEBKIT_GLUE_MEDIA_BUFFERED_DATA_SOURCE_H_
 
 #include <algorithm>
 #include <string>
 #include <vector>
@@ skipping 108 matching lines @@
       const webkit_glue::ResourceLoaderBridge::ResponseInfo& info,
       bool content_filtered);
   virtual void OnReceivedData(const char* data, int len);
   virtual void OnCompletedRequest(const URLRequestStatus& status,
       const std::string& security_info);
   GURL GetURLForDebugging() const { return url_; }
 
  protected:
   friend class base::RefCountedThreadSafe<BufferedResourceLoader>;
 
-  // An empty constructor so mock classes can be constructed.
-  BufferedResourceLoader() {
-  }
-
   virtual ~BufferedResourceLoader();
 
  private:
   friend class BufferedResourceLoaderTest;
 
   // Defer the resource loading if the buffer is full.
   void EnableDeferIfNeeded();
 
   // Disable defer loading if we are under-buffered.
   void DisableDeferIfNeeded();
@@ skipping 265 matching lines @@
   // loop. The RepeatingTimer does PostDelayedTask() internally, by using it
   // the message loop doesn't hold a reference for the watch dog task.
   base::RepeatingTimer<BufferedDataSource> watch_dog_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(BufferedDataSource);
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_GLUE_MEDIA_BUFFERED_DATA_SOURCE_H_