Delete NetworkingContext and its subclasses.

Source/core/loader/EmptyClients.cpp

Index: Source/core/loader/EmptyClients.cpp
diff --git a/Source/core/loader/EmptyClients.cpp b/Source/core/loader/EmptyClients.cpp
index 76d3f17e38d42d227c5e37e0625bdf0a7112624c..e4e38ab8f71785c64116975f9071820b01fe5232 100644
--- a/Source/core/loader/EmptyClients.cpp
+++ b/Source/core/loader/EmptyClients.cpp
@@ -31,7 +31,6 @@
 #include "core/html/HTMLFormElement.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FormState.h"
-#include "core/loader/FrameNetworkingContext.h"
 #include "core/page/Frame.h"
 #include "core/platform/DateTimeChooser.h"
 #include "core/platform/FileChooser.h"
@@ -130,11 +129,6 @@ PassRefPtr<Widget> EmptyFrameLoaderClient::createJavaAppletWidget(const IntSize&
     return 0;
 }
 
-PassRefPtr<FrameNetworkingContext> EmptyFrameLoaderClient::createNetworkingContext()
-{
-    return PassRefPtr<FrameNetworkingContext>();
-}
-
 void EmptyTextCheckerClient::requestCheckingOfString(PassRefPtr<TextCheckingRequest>)
 {
 }