[Icons NTP] Working prototype to fetch, store, and display big icons.

chrome/common/favicon/big_icon_url_parser.h

+// Copyright 2015 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_COMMON_FAVICON_BIG_ICON_URL_PARSER_H_
+#define CHROME_COMMON_FAVICON_BIG_ICON_URL_PARSER_H_
+
+#include <string>
+
+#include "base/gtest_prod_util.h"
+#include "base/macros.h"
+
+namespace chrome {
+
+class BigIconUrlParser {

[Roger McFarlane (Chromium), 2015/03/16 19:00:59]

BigIconUrl... taking the input URL in the constructor? Private Parse method? Add
an IsValid() method tracking whether or not the parse succeeded
(!url_string_.empty()).

+ public:
+  BigIconUrlParser();
+  ~BigIconUrlParser();
+
+  std::string url_string() const { return url_string_; }
+
+  int size_in_pixels() const { return size_in_pixels_; }
+
+  size_t path_index() const { return path_index_; }
+
+  // Parses |path|, which should be in the format described at the top of the
+  // file "chrome/browser/ui/webui/big_icon_source.h".
+  bool Parse(const std::string& path);
+
+ private:
+
+  friend class BigIconUrlParserTest;
+
+  // The page URL string of the fallback icon is requested for.
+  std::string url_string_;
+
+  // The size of the requested fallback icon in pixels.
+  int size_in_pixels_;
+
+  // The index of the first character (relative to the path) where the the URL
+  // from which the big icon is being requested is located.
+  size_t path_index_;
+
+  DISALLOW_COPY_AND_ASSIGN(BigIconUrlParser);
+};
+
+}  // namespace chrome
+
+#endif  // CHROME_COMMON_FAVICON_BIG_ICON_URL_PARSER_H_