Visual viewport API initial implementation.

third_party/WebKit/Source/core/dom/Document.idl

 /*
  * Copyright (C) 2006, 2007, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006, 2007 Samuel Weinig <sam@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
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     // FIXME: clear(), captureEvents(), releaseEvents() and all are on HTMLDocument.
 
     // CSS Object Model (CSSOM)
     // http://dev.w3.org/csswg/cssom/#extensions-to-the-document-interface
     attribute DOMString? selectedStylesheetSet;
     readonly attribute DOMString? preferredStylesheetSet;
 
     readonly attribute Element? scrollingElement;
 
+    // Visual Viewport API
+    // https://github.com/WICG/ViewportAPI
+    [RuntimeEnabled=VisualViewportAPI] readonly attribute VisualViewport? visualViewport;
 
     // Pointer Lock
     // https://dvcs.w3.org/hg/pointerlock/raw-file/default/index.html#extensions-to-the-document-interface
     attribute EventHandler onpointerlockchange;
     attribute EventHandler onpointerlockerror;
     [MeasureAs=DocumentPointerLockElement] readonly attribute Element? pointerLockElement;
     [MeasureAs=DocumentExitPointerLock] void exitPointerLock();
 
     // Touch Events
     // http://rawgit.com/w3c/touch-events/v1-errata/touchevents.html#extensions-to-the-document-interface
@@ skipping 49 matching lines @@
     [RuntimeEnabled=ExperimentalContentSecurityPolicyFeatures] attribute EventHandler onsecuritypolicyviolation;
     attribute EventHandler onselectionchange;
     attribute EventHandler onselectstart;
     attribute EventHandler onwheel;
 };
 
 Document implements GlobalEventHandlers;
 Document implements ParentNode;
 Document implements NonElementParentNode;
 Document implements DocumentOrShadowRoot;