Update permission warning for contentSettings API

components/content_settings/core/common/content_settings_pattern.cc

 // Copyright (c) 2012 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/content_settings_pattern.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "components/content_settings/core/common/content_settings_pattern_parser.h"
 #include "net/base/url_util.h"
+#include "third_party/re2/src/re2/re2.h"
 #include "url/gurl.h"
 
 namespace {
 
 // The component supports only one scheme for simplicity.
 const char* non_port_non_domain_wildcard_scheme = NULL;
 
 // Keep it consistent with enum SchemeType in content_settings_pattern.h.
 const char* const kSchemeNames[] = {
   "wildcard",
@@ skipping 499 matching lines @@
   : is_valid_(false) {
 }
 
 ContentSettingsPattern::ContentSettingsPattern(
     const PatternParts& parts,
     bool valid)
     : parts_(parts),
       is_valid_(valid) {
 }
 
+bool ContentSettingsPattern::IsExtensionUrlWildcard() const {
+  if (!parts_.is_scheme_wildcard && parts_.scheme != "chrome-extension")
+    return false;
+  const char kExtensionIdRegex[] = "[a-zA-Z]{32}";
+
+  return parts_.has_domain_wildcard ||
+         RE2::FullMatch(parts_.host, kExtensionIdRegex);
+}
+
 bool ContentSettingsPattern::Matches(
     const GURL& url) const {
   // An invalid pattern matches nothing.
   if (!is_valid_)
     return false;
 
   const GURL* local_url = &url;
   if (url.SchemeIsFileSystem() && url.inner_url()) {
     local_url = url.inner_url();
   }
@@ skipping 275 matching lines @@
   if (!parts.is_path_wildcard && other_parts.is_path_wildcard)
     return ContentSettingsPattern::PREDECESSOR;
 
   int result = parts.path.compare(other_parts.path);
   if (result == 0)
     return ContentSettingsPattern::IDENTITY;
   if (result > 0)
     return ContentSettingsPattern::DISJOINT_ORDER_PRE;
   return ContentSettingsPattern::DISJOINT_ORDER_POST;
 }