NetInfo network quality extension: Add callbacks and Layout tests

third_party/WebKit/Source/core/testing/Internals.idl

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
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+enum EffectiveConnectionType {
+    "slow-2g",
+    "2g",
+    "3g",
+    "4g"
+};
+
 [
     DoNotCheckConstants,
 ] interface Internals {
     GCObservation observeGC(any observed);
 
     [RaisesException] DOMString elementLayoutTreeAsText(Element element);
     boolean isPreloaded(DOMString url);
     boolean isPreloadedBy(DOMString url, Document document);
     boolean isLoading(DOMString url);
     boolean isLoadingFromMemoryCache(DOMString url);
@@ skipping 270 matching lines @@
 
     DOMString textSurroundingNode(Node node, long x, long y, unsigned long maxLength);
 
     void setFocused(boolean focused);
     void setInitialFocus(boolean reverse);
 
     boolean ignoreLayoutWithPendingStylesheets(Document document);
 
     // These functions are for testing NetInfo. You must call clearNetworkConnectionInfoOverride() at the end.
     [RaisesException] void setNetworkConnectionInfoOverride(boolean onLine, DOMString type, double downlinkMaxMbps);
+    [RaisesException] void setNetworkQualityInfoOverride(EffectiveConnectionType effective_type, unsigned long transport_rtt_msec, double downlink_throughput_mbps);
     void clearNetworkConnectionInfoOverride();
 
     // This function is for testing HitRegions on Canvas2D.
     unsigned long countHitRegions(CanvasRenderingContext2D context);
 
     boolean isInCanvasFontCache(Document document, DOMString fontString);
     unsigned long canvasFontCacheMaxFonts();
 
     DictionaryTest dictionaryTest();
     RecordTest recordTest();
@@ skipping 45 matching lines @@
     DOMString getProgrammaticScrollAnimationState(Node node);
 
     ClientRect visualRect(Node node);
 
     OriginTrialsTest originTrialsTest();
 
     void crash();
 
     void setIsLowEndDevice(boolean isLowEndDevice);
 };