Adds ability to prevent browser connection updates in layout tests.

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 2324 matching lines @@
     blink::WebPoint point(x, y);
     SurroundingText surroundingText(VisiblePosition(node->renderer()->positionForPoint(static_cast<IntPoint>(point))), maxLength);
     return surroundingText.content();
 }
 
 void Internals::setFocused(bool focused)
 {
     frame()->page()->focusController().setFocused(focused);
 }
 
+void Internals::setNetworkStateNotifierTestOnly(bool testOnly)
+{
+    networkStateNotifier().setTestUpdatesOnly(testOnly);
+}
+
 void Internals::setNetworkConnectionInfo(const String& type, ExceptionState& exceptionState)
 {
     blink::WebConnectionType webtype;
     if (type == "cellular") {
         webtype = blink::ConnectionTypeCellular;
     } else if (type == "bluetooth") {
         webtype = blink::ConnectionTypeBluetooth;
     } else if (type == "ethernet") {
         webtype = blink::ConnectionTypeEthernet;
     } else if (type == "wifi") {
         webtype = blink::ConnectionTypeWifi;
     } else if (type == "other") {
         webtype = blink::ConnectionTypeOther;
     } else if (type == "none") {
         webtype = blink::ConnectionTypeNone;
     } else {
         exceptionState.throwDOMException(NotFoundError, ExceptionMessages::failedToEnumerate("connection type", type));
         return;
     }
-    networkStateNotifier().setWebConnectionType(webtype);
+    networkStateNotifier().setWebConnectionTypeForTest(webtype);
 }
 
 } // namespace WebCore