Functionality to allow blacklist and whitelist of custom schemes

components/policy/core/browser/url_blacklist_manager.h

Index: components/policy/core/browser/url_blacklist_manager.h
diff --git a/components/policy/core/browser/url_blacklist_manager.h b/components/policy/core/browser/url_blacklist_manager.h
index db1763304ac07141b4ec12de41b81444d095da4f..0297d1168e50752ad8577c8667157ba5fb5c7be3 100644
--- a/components/policy/core/browser/url_blacklist_manager.h
+++ b/components/policy/core/browser/url_blacklist_manager.h
@@ -21,6 +21,7 @@
 #include "components/policy/policy_export.h"
 #include "components/prefs/pref_change_registrar.h"
 #include "components/url_matcher/url_matcher.h"
+#include "net/base/network_delegate.h"
 #include "url/gurl.h"
 
 class PrefService;
@@ -62,12 +63,16 @@ class POLICY_EXPORT URLBlacklist {
   // Returns true if the URL is blocked.
   bool IsURLBlocked(const GURL& url) const;
 
+  net::NetworkDelegate::URLBlacklistState GetURLBlacklistState(
+      const GURL& url) const;
+
   // Returns the number of items in the list.
   size_t Size() const;
 
   // Splits a URL filter into its components. A GURL isn't used because these
   // can be invalid URLs e.g. "google.com".
-  // Returns false if the URL couldn't be parsed.
+  // Returns false if the URL couldn't be parsed. In case false is returned,
+  // the values of output parameters are undefined.
   // The |host| is preprocessed so it can be passed to URLMatcher for the
   // appropriate condition.
   // The optional username and password are ignored.
@@ -76,6 +81,7 @@ class POLICY_EXPORT URLBlacklist {
   // |port| is 0 if none is explicitly defined.
   // |path| does not include query parameters.
   // |query| contains the query parameters ('?' not included).
+  // All arguments are mandatory.
   static bool FilterToComponents(SegmentURLCallback segment_url,
                                  const std::string& filter,
                                  std::string* scheme,
@@ -160,6 +166,9 @@ class POLICY_EXPORT URLBlacklistManager {
   // from the IO thread.
   bool IsURLBlocked(const GURL& url) const;
 
+  net::NetworkDelegate::URLBlacklistState GetURLBlacklistState(
+      const GURL& url) const;
+
   // Returns true if a request for |url| is blocked by the current blacklist.
   //
   // Should only be called for requests for frames (Main frames or subframes).