Implement matching of URL patterns.

components/subresource_filter/core/common/url_pattern.h

Index: components/subresource_filter/core/common/url_pattern.h
diff --git a/components/subresource_filter/core/common/url_pattern.h b/components/subresource_filter/core/common/url_pattern.h
new file mode 100644
index 0000000000000000000000000000000000000000..f49b5ea610bbaa26a9bfeb98187a23762cdc9f1c
--- /dev/null
+++ b/components/subresource_filter/core/common/url_pattern.h
@@ -0,0 +1,53 @@
+// Copyright 2016 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_SUBRESOURCE_FILTER_CORE_COMMON_URL_PATTERN_H_
+#define COMPONENTS_SUBRESOURCE_FILTER_CORE_COMMON_URL_PATTERN_H_
+
+#include "base/macros.h"
+#include "base/strings/string_piece.h"
+#include "components/subresource_filter/core/common/proto/rules.pb.h"
+
+namespace subresource_filter {
+
+namespace flat {
+struct UrlRule;  // The FlatBuffers version of UrlRule.
+}
+
+// The structure used to mirror a URL pattern regardless of the representation
+// of the UrlRule that owns it.
+struct UrlPattern {
+  UrlPattern();
+
+  // Creates a |url_pattern| of a certain |type|.
+  UrlPattern(base::StringPiece url_pattern,
+             proto::UrlPatternType type = proto::URL_PATTERN_TYPE_WILDCARDED);
+
+  // Creates a WILDCARDED |url_pattern| with the specified anchors.
+  UrlPattern(base::StringPiece url_pattern,
+             proto::AnchorType anchor_left,
+             proto::AnchorType anchor_right);
+
+  // The following constructors create UrlPattern from one of the UrlRule
+  // representations. The passed in |rule| must outlive the created instance.
+  explicit UrlPattern(const flat::UrlRule& rule);
+  explicit UrlPattern(const proto::UrlRule& rule);
+
+  ~UrlPattern();
+
+  proto::UrlPatternType type = proto::URL_PATTERN_TYPE_UNSPECIFIED;
+  base::StringPiece url_pattern;
+
+  proto::AnchorType anchor_left = proto::ANCHOR_TYPE_NONE;
+  proto::AnchorType anchor_right = proto::ANCHOR_TYPE_NONE;
+
+  bool match_case = false;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(UrlPattern);
+};
+
+}  // namespace subresource_filter
+
+#endif  // COMPONENTS_SUBRESOURCE_FILTER_CORE_COMMON_URL_PATTERN_H_