Support tracking focused node element for OOPIFs.

content/public/test/text_input_test_utils.cc

Index: content/public/test/text_input_test_utils.cc
diff --git a/content/public/test/text_input_test_utils.cc b/content/public/test/text_input_test_utils.cc
index 614ead55babe7cba0a2a8777e7491d91561bd24d..6e734b9d546f85f9e7dd80264d71b65eb33a0a45 100644
--- a/content/public/test/text_input_test_utils.cc
+++ b/content/public/test/text_input_test_utils.cc
@@ -6,6 +6,7 @@
 
 #include <unordered_set>
 
+#include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
@@ -256,6 +257,11 @@ bool RequestCompositionInfoFromActiveWidget(WebContents* web_contents) {
   return true;
 }
 
+bool DoesFrameHaveFocusedEditableElement(RenderFrameHost* frame) {
+  return static_cast<RenderFrameHostImpl*>(frame)
+      ->has_focused_editable_element();
+}
+
 size_t GetRegisteredViewsCountFromTextInputManager(WebContents* web_contents) {
   std::unordered_set<RenderWidgetHostView*> views;
   TextInputManager* manager =