Limit PassiveDocumentEventListeners to touch and make it experimental

third_party/WebKit/Source/web/tests/FrameThrottlingTest.cpp

 // Copyright 2015 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.
 
 #include "bindings/core/v8/ScriptController.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLIFrameElement.h"
@@ skipping 615 matching lines @@
 
     // Create a frame which is throttled and has two different types of
     // top-level touchstart handlers.
     SimRequest mainResource("https://example.com/", "text/html");
     SimRequest frameResource("https://example.com/iframe.html", "text/html");
 
     loadURL("https://example.com/");
     mainResource.complete("<iframe id=frame sandbox=allow-scripts src=iframe.html></iframe>");
     frameResource.complete(
         "<script>"
-        "window.addEventListener('touchstart', function(){});"
-        "document.addEventListener('touchstart', function(){});"
+        "window.addEventListener('touchstart', function(){}, {passive: false});"
+        "document.addEventListener('touchstart', function(){}, {passive: false});"
         "</script>");
     auto* frameElement = toHTMLIFrameElement(document().getElementById("frame"));
     frameElement->setAttribute(styleAttr, "transform: translateY(480px)");
     compositeFrame(); // Throttle the frame.
     compositeFrame(); // Update touch handler regions.
 
     // The touch handlers in the throttled frame should have been ignored.
     EXPECT_EQ(0u, touchHandlerRegionSize());
 
     // Unthrottling the frame makes the touch handlers active again. Note that
@@ skipping 197 matching lines @@
     localFrame->script().executeScriptInMainWorld(
         "window.requestAnimationFrame(function() {\n"
         "  var throttledFrame = window.parent.frames.first;\n"
         "  throttledFrame.document.documentElement.style = 'margin: 50px';\n"
         "  throttledFrame.document.querySelector('#d').getBoundingClientRect();\n"
         "});\n");
     compositeFrame();
 }
 
 } // namespace blink