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diff --git a/components/favicon_base/favicon_url_parser.h b/components/favicon_base/favicon_url_parser.h
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+++ b/components/favicon_base/favicon_url_parser.h
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+// Copyright 2013 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 COMPONENTS_FAVICON_BASE_FAVICON_URL_PARSER_H_
+#define COMPONENTS_FAVICON_BASE_FAVICON_URL_PARSER_H_
+
+#include <string>
+
+namespace chrome {
+
+struct ParsedFaviconPath {
+  // Whether the URL has the "iconurl" parameter.
+  bool is_icon_url;
+
+  // The URL from which the favicon is being requested.
+  std::string url;
+
+  // The size of the requested favicon in dip.
+  int size_in_dip;
+
+  // The device scale factor of the requested favicon.
+  float device_scale_factor;
+
+  // The index of the first character (relative to the path) where the the URL
+  // from which the favicon is being requested is located.
+  size_t path_index;
+};
+
+// Parses |path|, which should be in the format described at the top of the
+// file "chrome/browser/ui/webui/favicon_source.h". |icon_types| indicates
+// which icon types are supported. Returns true if |path| could be parsed.
+// The result of the parsing will be stored in a ParsedFaviconPath struct.
+bool ParseFaviconPath(const std::string& path,
+                      int icon_types,
+                      ParsedFaviconPath* parsed);
+
+}  // namespace chrome
+
+#endif  // COMPONENTS_FAVICON_BASE_FAVICON_URL_PARSER_H_