Disable clipping on root scroller's ancestors.

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

 // Copyright 2016 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 "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/TopControls.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/page/Page.h"
 #include "core/page/scrolling/RootScrollerController.h"
@@ skipping 578 matching lines @@
     }
 }
 
 TEST_F(RootScrollerTest, TestSetRootScrollerCausesViewportLayerChange)
 {
     // TODO(bokan): Need a test that changing root scrollers actually sets the
     // outer viewport layer on the compositor, even in the absence of other
     // compositing changes. crbug.com/505516
 }
 
-

[chrishtr, 2016/09/01 23:42:57]

spurious

[bokan, 2016/09/09 00:19:02]

Done.

 // Tests that trying to set an element as the root scroller of a document inside
 // an iframe fails when that element belongs to the parent document.
 // TODO(bokan): Recent changes mean this is now possible but should be fixed.
 TEST_F(RootScrollerTest, DISABLED_TestSetRootScrollerOnElementFromOutsideIframe)
 {
     initialize("root-scroller-iframe.html");
 
     ASSERT_EQ(nullptr, mainFrame()->document()->rootScroller());
     {
         // Try to set the the root scroller of the child document to be the
@@ skipping 19 matching lines @@
             body,
             exceptionState);
 
         ASSERT_EQ(body, iframe->contentDocument()->rootScroller());
     }
 }
 
 } // namespace
 
 } // namespace blink