Intersection Observer support for OOPIF

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 4c0fda13bb72976e3dd52db55248cf0bf05495d2..c03656f24a0ca3959b5d459cee8e6b6e865115be 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -618,6 +618,8 @@ bool RenderWidget::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(ViewMsg_SetTextDirection, OnSetTextDirection)
     IPC_MESSAGE_HANDLER(ViewMsg_Move_ACK, OnRequestMoveAck)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateScreenRects, OnUpdateScreenRects)
+    IPC_MESSAGE_HANDLER(ViewMsg_SetViewportIntersection,
+                        OnSetViewportIntersection)
     IPC_MESSAGE_HANDLER(ViewMsg_WaitForNextFrameForTests,
                         OnWaitNextFrameForTests)
     IPC_MESSAGE_HANDLER(InputMsg_RequestCompositionUpdate,
@@ -1636,6 +1638,15 @@ void RenderWidget::OnUpdateWindowScreenRect(
     window_screen_rect_ = window_screen_rect;
 }
 
+void RenderWidget::OnSetViewportIntersection(
+    const gfx::Rect& viewport_intersection) {
+  if (GetWebWidget() && GetWebWidget()->isWebFrameWidget()) {
+    DCHECK(popup_type_ == WebPopupType::WebPopupTypeNone);
+    static_cast<WebFrameWidget*>(GetWebWidget())
+        ->setRemoteViewportIntersection(viewport_intersection);
+  }
+}
+
 void RenderWidget::OnHandleCompositorProto(const std::vector<uint8_t>& proto) {
   if (compositor_)
     compositor_->OnHandleCompositorProto(proto);