Give URLRequestJobFactory::Interceptors the ability to specify protocols they handle.

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
diff --git a/chrome/browser/profiles/profile_io_data.cc b/chrome/browser/profiles/profile_io_data.cc
index a86feba758d5db2b724834d884fd56939557f2a4..fae1711967d551da40b4457e2ceb6887392659de 100644
--- a/chrome/browser/profiles/profile_io_data.cc
+++ b/chrome/browser/profiles/profile_io_data.cc
@@ -155,6 +155,10 @@ class ProtocolHandlerRegistryInterceptor
     return protocol_handler_registry_->MaybeCreateJob(request);
   }
 
+  virtual bool WillHandleProtocol(const std::string& protocol) const {
+    return protocol_handler_registry_->IsHandledProtocol(protocol);
+  }
+
   virtual net::URLRequestJob* MaybeInterceptRedirect(
       const GURL& url, net::URLRequest* request) const OVERRIDE {
     return NULL;