Update telemetry tests that rely on window.innerWidth/Height.

tools/telemetry/telemetry/internal/actions/gesture_common.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file provides common functionality for synthetic gesture actions.
 'use strict';
 
 (function() {
 
   // Returns the bounding rectangle wrt to the top-most document.
@@ skipping 21 matching lines @@
     var rect = getBoundingRect(el);
     if (rect.top < 0) {
       rect.height += rect.top;
       rect.top = 0;
     }
     if (rect.left < 0) {
       rect.width += rect.left;
       rect.left = 0;
     }
 
-    var outsideHeight = (rect.top + rect.height) - window.innerHeight;
-    var outsideWidth = (rect.left + rect.width) - window.innerWidth;
+    var outsideHeight = (rect.top + rect.height) -
+        chrome.gpuBenchmarking.visualViewportHeight();

[Sami, 2015/10/14 10:44:38]

Some telemetry tests run against older reference builds which won't have these
new properties. Could you write this in a way that works in both cases (with a
TODO to remove the fallback path after once the properties roll into stable)?

/me wonders if the visual viewport dimensions should be exposed to the web
platform too...

[ymalik, 2015/10/14 15:56:10]

Done. 

We do have plans in the future (perhaps next quarter) to expose the visual
viewport dimensions to the web platform. 

+    var outsideWidth = (rect.left + rect.width) -
+        chrome.gpuBenchmarking.visualViewportWidth();
 
     if (outsideHeight > 0) {
       rect.height -= outsideHeight;
     }
     if (outsideWidth > 0) {
       rect.width -= outsideWidth;
     }
     return rect;
   };
 
   window.__GestureCommon_GetBoundingVisibleRect = getBoundingVisibleRect;
 })();