Clean content_settings_pattern_parser.* from unnecessary dependencies.

components/content_settings/core/common/embedder_variables.cc

+// Copyright (c) 2014 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/content_settings/core/common/embedder_variables.h"
+
+#include "base/logging.h"
+
+namespace content_settings {
+
+// The component supports only one scheme for simplicity.
+const char* non_port_non_domain_wildcard_scheme = NULL;
+
+void SetNonWildcardDomainNonPortScheme(const char* scheme) {
+  DCHECK(scheme);
+  DCHECK(!non_port_non_domain_wildcard_scheme ||
+         non_port_non_domain_wildcard_scheme == scheme);
+  non_port_non_domain_wildcard_scheme = scheme;
+}
+
+bool IsNonWildcardDomainNonPortScheme(const std::string& scheme) {
+  DCHECK(non_port_non_domain_wildcard_scheme);
+  return scheme == non_port_non_domain_wildcard_scheme;
+}
+
+}  // namespace content_settings