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diff --git a/net/url_request/url_request_job_metrics.h b/net/url_request/url_request_job_metrics.h
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Records IO statistics associated with a URLRequestJob.
+// See description in navigation_profiler.h for an overview of perf profiling.
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/scoped_ptr.h"
+#include "base/time.h"
+#include "googleurl/src/gurl.h"
+
+#ifndef BASE_URL_REQUEST_URL_REQUEST_JOB_METRICS_H__
+#define BASE_URL_REQUEST_URL_REQUEST_JOB_METRICS_H__
+
+class URLRequestJobMetrics {
+ public:
+  URLRequestJobMetrics() : total_bytes_read_(0), number_of_read_IO_(0) { }
+  ~URLRequestJobMetrics() { }
+
+  // The original url the job has been created for.
+  scoped_ptr<GURL> original_url_;
+
+  // The actual url the job connects to. If the actual url is same as the
+  // original url, url_ is empty.
+  scoped_ptr<GURL> url_;
+
+  // Time when the job starts.
+  TimeTicks start_time_;
+
+  // Time when the job is done.
+  TimeTicks end_time_;
+
+  // Total number of bytes the job reads from underline IO.
+  int total_bytes_read_;
+
+  // Number of IO read operations the job issues.
+  int number_of_read_IO_;
+
+  // Final status of the job.
+  bool success_;
+
+  // Append the text report of the frame loading to the input string.
+  void AppendText(std::wstring* text);
+};
+
+#endif  // BASE_URL_REQUEST_URL_REQUEST_JOB_METRICS_H__