Move extensions/common/matcher into components/url_matcher.

This allows using that code in builds that don't include extensions without
having to introduce layering exceptions. This is meant for inclusion on the
iOS build.

BUG=271392
TBR=brettw@chromium.org

Review URL: https://codereview.chromium.org/113903002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240736 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 31 insertions, 0 deletions

diff --git a/components/url_matcher/url_matcher_helpers.cc b/components/url_matcher/url_matcher_helpers.cc
new file mode 100644
index 0000000..61358e7
--- /dev/null
+++ b/components/url_matcher/url_matcher_helpers.cc
@@ -0,0 +1,31 @@
+// 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.
+
+#include "components/url_matcher/url_matcher_helpers.h"
+
+#include "base/values.h"
+
+namespace url_matcher {
+namespace url_matcher_helpers {
+
+// Converts a ValueList |value| of strings into a vector. Returns true if
+// successful.
+bool GetAsStringVector(const base::Value* value,
+                       std::vector<std::string>* out) {
+  const ListValue* value_as_list = 0;
+  if (!value->GetAsList(&value_as_list))
+    return false;
+
+  size_t number_types = value_as_list->GetSize();
+  for (size_t i = 0; i < number_types; ++i) {
+    std::string item;
+    if (!value_as_list->GetString(i, &item))
+      return false;
+    out->push_back(item);
+  }
+  return true;
+}
+
+}  // namespace url_matcher_helpers
+}  // namespace url_matcher