Schedule a frame from IntersectionObserver::observe.

third_party/WebKit/Source/core/dom/IntersectionObserver.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/dom/IntersectionObserver.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/css/parser/CSSParserTokenRange.h"
 #include "core/css/parser/CSSTokenizer.h"
 #include "core/dom/Element.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/IntersectionObserverCallback.h"
 #include "core/dom/IntersectionObserverController.h"
 #include "core/dom/IntersectionObserverEntry.h"
 #include "core/dom/IntersectionObserverInit.h"
 #include "core/dom/NodeIntersectionObserverData.h"
+#include "core/frame/FrameView.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/layout/LayoutView.h"
 #include "core/timing/DOMWindowPerformance.h"
 #include "core/timing/Performance.h"
 #include "platform/Timer.h"
 #include <algorithm>
 
 namespace blink {
 
 static void parseRootMargin(String rootMarginParameter, Vector<Length>& rootMargin, ExceptionState& exceptionState)
@@ skipping 148 matching lines @@
         return;
 
     bool shouldReportRootBounds = false;
     LocalFrame* targetFrame = target->document().frame();
     LocalFrame* rootFrame = rootNode()->document().frame();
     if (targetFrame && rootFrame)
         shouldReportRootBounds = targetFrame->securityContext()->getSecurityOrigin()->canAccess(rootFrame->securityContext()->getSecurityOrigin());
     IntersectionObservation* observation = new IntersectionObservation(*this, *target, shouldReportRootBounds);
     target->ensureIntersectionObserverData().addObservation(*observation);
     m_observations.add(observation);
+    if (!rootFrame)
+        return;
+    if (FrameView* rootFrameView = rootFrame->view())
+        rootFrameView->scheduleAnimation();

[esprehn, 2016/05/20 22:40:52]

I think this is probably broken for OOPIF, we need to audit the IO code in
general for how to make it work in OOPIF.

[szager1, 2016/05/20 22:42:12]

Oh yes, undoubtedly, IO is completely broken for OOPIF.

 }
 
 void IntersectionObserver::unobserve(Element* target)
 {
     if (!target || !target->intersectionObserverData())
         return;
     // TODO(szager): unobserve callback
     if (IntersectionObservation* observation = target->intersectionObserverData()->getObservationFor(*this))
         observation->disconnect();
 }
@@ skipping 110 matching lines @@
 
 DEFINE_TRACE(IntersectionObserver)
 {
     visitor->template registerWeakMembers<IntersectionObserver, &IntersectionObserver::clearWeakMembers>(this);
     visitor->trace(m_callback);
     visitor->trace(m_observations);
     visitor->trace(m_entries);
 }
 
 } // namespace blink