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 beaf2921ee9f69ecee1b52b110772f24376014f7..fbb84836bac6ef44dbe632e851841bc64a94b698 100644
--- a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
+++ b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
@@ -734,6 +734,17 @@ void WebFrameWidgetImpl::applyReplacementRange(const WebRange& range) {
   }
 }
 
+void WebFrameWidgetImpl::setRemoteViewportIntersection(
+    const WebRect& viewportIntersection) {
+  // Remote viewports are only applicable to local frames with remote ancestors.
+  if (!m_localRoot->parent() || !m_localRoot->parent()->isWebRemoteFrame())
+    return;
+  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.