Add Blink setting to block doc.written scripts on 2g-like networks

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

 /*
  * 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 285 matching lines @@
 
     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);
     void clearNetworkConnectionInfoOverride();
 
+    // These functions are for testing the effective connection type. You must call clearEffectiveConnectionTypeOverride at the end.
+    [RaisesException] void setEffectiveConnectionTypeOverride(DOMString type);

[Nate Chapin, 2016/09/16 21:56:41]

These APIs want to override logic that doesn't reside in blink, so Internals
isn't the right API. These should go on the testRunner API, which is implemented
out in components/test_runner/. That also removes the need for test-only values
in RenderFrameImpl, as WebFrameTestClient can peak at testRunner settings and
defer to RenderFrameImpl iff a test override isn't set.

[jkarlin, 2016/09/19 14:38:25]

With the testRunner API, I'd have to configure the test via test_interfaces.cc
to have the correct override, is that correct? That's non-obvious. I'd much
rather have something configurable from JavaScript, much like we already have
for configuring the network type that the NetworkStateNotifier returns.

+    void clearEffectiveConnectionTypeOverride();
+
     // This function is for testing HitRegions on Canvas2D.
     unsigned long countHitRegions(CanvasRenderingContext2D context);
 
     boolean isInCanvasFontCache(Document document, DOMString fontString);
     unsigned long canvasFontCacheMaxFonts();
 
     DictionaryTest dictionaryTest();
     UnionTypesTest unionTypesTest();
     [RaisesException] void setScrollChain(ScrollState scrollState, Element[] elements);
     void forceBlinkGCWithoutV8GC();
@@ skipping 33 matching lines @@
     void triggerAutoplayViewportCheck(HTMLMediaElement mediaElement);
 
     DOMString getScrollAnimationState(Node node);
 
     DOMString getProgrammaticScrollAnimationState(Node node);
 
     ClientRect visualRect(Node node);
 
     void crash();
 };