Fix domain whitelisting and remove unused code

src/engine/main.cpp

Index: src/engine/main.cpp
===================================================================
--- a/src/engine/main.cpp
+++ b/src/engine/main.cpp
@@ -120,6 +120,14 @@
         WriteStrings(response, domains);
         break;
       }
+      case Communication::PROC_IS_WHITELISTED_URL:
+      {
+        std::string url;
+        request >> url;
+        AdblockPlus::FilterPtr match = filterEngine->Matches(url, "DOCUMENT", "");

[Wladimir Palant, 2013/06/25 11:55:13]

Please use url as the document URL parameter as well here rather than an empty
string (important for $third-party to be handled correctly). Note: the
assumption here is that we will only use that check for top-level documents,
documentUrl will typically be a different one for frames.

+        response << (match && match->GetType() == AdblockPlus::Filter::TYPE_EXCEPTION);
+        break;
+      }
       case Communication::PROC_ADD_FILTER:
       {
         std::string text;