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 {
+
+const char* extension_scheme = NULL;
+
+void SetNonPortScheme(const char* scheme) {
+  extension_scheme = scheme;

[Bernhard Bauer, 2014/08/18 15:55:13]

DCHECK that this isn't called more than once (with the same scheme)?

[vasilii, 2014/08/20 08:44:06]

Doesn't work for browser tests. It's called twice (from
ChromeTestSuite::Initialize() and ChromeMainDelegate::BasicStartupComplete()).

[Bernhard Bauer, 2014/08/21 15:05:54]

OK, then can you at least DCHECK that if it's called more than once, it's always
with the same scheme?

[vasilii, 2014/08/22 13:02:45]

Done.

+}
+
+// Compares |scheme| against embedder's extension scheme.
+bool IsNonPortScheme(const std::string& scheme) {
+  DCHECK(extension_scheme);
+  return scheme == extension_scheme;
+}
+
+}  // namespace content_settings