Seculative resource prefetching for URLs CL.

chrome/browser/predictors/resource_prefetch_common.cc

+// 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.
+
+#include "chrome/browser/predictors/resource_prefetch_common.h"
+
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
+
+namespace predictors {
+
+NavigationID::NavigationID() : render_process_id(-1), render_view_id(-1) {
+}
+
+NavigationID::NavigationID(const NavigationID& other)
+    : render_process_id(other.render_process_id),
+      render_view_id(other.render_view_id),
+      main_frame_url(other.main_frame_url),
+      creation_time(other.creation_time) {
+}
+
+NavigationID::NavigationID(const content::WebContents& web_contents)
+    : render_process_id(web_contents.GetRenderProcessHost()->GetID()),
+      render_view_id(web_contents.GetRenderViewHost()->GetRoutingID()),
+      main_frame_url(web_contents.GetURL()) {
+}
+
+bool NavigationID::is_valid() const {
+  return render_process_id != -1 && render_view_id != -1 &&
+      !main_frame_url.is_empty();
+}
+
+bool NavigationID::operator<(const NavigationID& rhs) const {
+  DCHECK(is_valid() && rhs.is_valid());
+  if (render_process_id != rhs.render_process_id)
+    return render_process_id < rhs.render_process_id;
+  else if (render_view_id != rhs.render_view_id)
+    return render_view_id < rhs.render_view_id;
+  else
+    return main_frame_url < rhs.main_frame_url;
+}
+
+bool NavigationID::operator==(const NavigationID& rhs) const {
+  DCHECK(is_valid() && rhs.is_valid());
+  return IsSameRenderer(rhs) && main_frame_url == rhs.main_frame_url;
+}
+
+bool NavigationID::IsSameRenderer(const NavigationID& other) const {
+  DCHECK(is_valid() && other.is_valid());
+  return render_process_id == other.render_process_id &&
+      render_view_id == other.render_view_id;
+}
+
+}  // namespace predictors