Support tracking focused node element for OOPIFs.

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index a4fa45ed7d336af730ef15443f7ef3b855b293d4..2397e771f3e1a7b4337a88eff7d0e54914c4e5c1 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -545,6 +545,7 @@ bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
     IPC_MESSAGE_HANDLER(ViewHostMsg_ForwardCompositorProto,
                         OnForwardCompositorProto)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetNeedsBeginFrames, OnSetNeedsBeginFrames)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_FocusedNodeTouched, OnFocusedNodeTouched)
     IPC_MESSAGE_HANDLER(DragHostMsg_StartDragging, OnStartDragging)
     IPC_MESSAGE_HANDLER(DragHostMsg_UpdateDragCursor, OnUpdateDragCursor)
     IPC_MESSAGE_UNHANDLED(handled = false)
@@ -1480,6 +1481,11 @@ void RenderWidgetHostImpl::OnSetNeedsBeginFrames(bool needs_begin_frames) {
     view_->SetNeedsBeginFrames(needs_begin_frames);
 }
 
+void RenderWidgetHostImpl::OnFocusedNodeTouched(bool editable) {
+  if (delegate_)
+    delegate_->FocusedNodeTouched(editable);
+}
+
 void RenderWidgetHostImpl::OnStartDragging(
     const DropData& drop_data,
     blink::WebDragOperationsMask drag_operations_mask,