Schedule a frame from IntersectionObserver::observe.

third_party/WebKit/Source/core/dom/IntersectionObserver.cpp

Index: third_party/WebKit/Source/core/dom/IntersectionObserver.cpp
diff --git a/third_party/WebKit/Source/core/dom/IntersectionObserver.cpp b/third_party/WebKit/Source/core/dom/IntersectionObserver.cpp
index 3aa1f7a61faeb1db5ac1fca3d07815e4beede129..47d0bc30dae330814b1d7176eac6d78dc28c8078 100644
--- a/third_party/WebKit/Source/core/dom/IntersectionObserver.cpp
+++ b/third_party/WebKit/Source/core/dom/IntersectionObserver.cpp
@@ -15,6 +15,7 @@
 #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"
@@ -183,6 +184,10 @@ void IntersectionObserver::observe(Element* target)
     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)