Seculative resource prefetching for URLs CL.

chrome/browser/predictors/resource_prefetch_common.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 CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_COMMON_H_
+#define CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_COMMON_H_
+#pragma once
+
+#include "base/time.h"
+#include "googleurl/src/gurl.h"
+
+namespace content {
+class WebContents;
+}
+
+namespace predictors {
+
+// Represents a single navigation for a render view.
+struct NavigationID {
+  NavigationID();

[dominich, 2012/05/30 15:35:01]

would you consider a constructor that takes the process, view, and URL to ensure
complete construction? 

[Shishir, 2012/05/30 18:07:15]

This would lead to the UrlRequestSummary also having to take all those as input,
in effect changing the InitMethod. I will add a todo here to take a look again
at this.

+  NavigationID(const NavigationID& other);
+  explicit NavigationID(const content::WebContents& web_contents);
+  bool operator<(const NavigationID& rhs) const;
+  bool operator==(const NavigationID& rhs) const;
+
+  bool IsSameRenderer(const NavigationID& other) const;
+
+  int render_process_id_;
+  int render_view_id_;
+  GURL main_frame_url_;
+
+  // NOTE: Even though we store the time ticks here, it is not used during
+  // comparison of two NavigationIDs because it cannot always be determined
+  // correctly.
+  base::TimeTicks creation_time_;
+};
+
+}  // namespace predictors
+
+#endif  // CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_COMMON_H_