Destroy the old RenderWidgetHostView when swapping out a main frame.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index f0b3cf2ca18565a0843d9ddb4d7a554468373184..25d7098002361f475027a1a3483d8c5e699cde15 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -1377,8 +1377,6 @@ void RenderFrameHostImpl::SwapOut(
   // TODO(nasko): If the frame is not live, the RFH should just be deleted by
   // simulating the receipt of swap out ack.
   is_waiting_for_swapout_ack_ = true;
-  if (frame_tree_node_->IsMainFrame())
-    render_view_host_->set_is_active(false);
 }
 
 void RenderFrameHostImpl::OnBeforeUnloadACK(
@@ -1545,13 +1543,6 @@ void RenderFrameHostImpl::OnSwappedOut() {
 
   ClearAllWebUI();
 
-  // If this is a main frame RFH that's about to be deleted, update its RVH's
-  // swapped-out state here. https://crbug.com/505887
-  if (frame_tree_node_->IsMainFrame()) {
-    render_view_host_->set_is_active(false);
-    render_view_host_->set_is_swapped_out(true);
-  }
-
   bool deleted =
       frame_tree_node_->render_manager()->DeleteFromPendingList(this);
   CHECK(deleted);