Intersection Observer support for OOPIF

third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp

Index: third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
index 9ab3a0a81e75eaf26acc7f379859d0e9140d532b..8d5d9e80510a020b6879ef60add586eea2b03504 100644
--- a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
+++ b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
@@ -725,6 +725,17 @@ void WebFrameWidgetImpl::applyReplacementRange(const WebRange& range) {
   }
 }
 
+void WebFrameWidgetImpl::setRemoteViewportIntersection(
+    const WebRect& viewportIntersection) {
+  // Remote viewports are only applicable to local frames with remote ancestors.
+  DCHECK(m_localRoot->parent() && m_localRoot->parent()->isWebRemoteFrame());
+
+  if (m_localRoot->frameView()) {
+    m_localRoot->frameView()->setViewportIntersectionFromParent(
+        viewportIntersection);
+  }
+}
+
 void WebFrameWidgetImpl::handleMouseLeave(LocalFrame& mainFrame,
                                           const WebMouseEvent& event) {
   // FIXME: WebWidget doesn't have the method below.