Set plugin focus by implementing HTMLPlugInElement::SetFocused.

third_party/WebKit/Source/core/html/shadow/DateTimeEditElement.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 574 matching lines @@
       // border/padding/margin in html.css.
       width += DateTimeFieldElement::ComputeTextWidth(
           *style, child_element->textContent());
     }
   }
   style->SetWidth(Length(ceilf(width), kFixed));
   style->SetUnique();
   return style.Release();
 }
 
-void DateTimeEditElement::DidBlurFromField() {
+void DateTimeEditElement::DidBlurFromField(WebFocusType focus_type) {
   if (edit_control_owner_)
-    edit_control_owner_->DidBlurFromControl();
+    edit_control_owner_->DidBlurFromControl(focus_type);
 }
 
-void DateTimeEditElement::DidFocusOnField() {
+void DateTimeEditElement::DidFocusOnField(WebFocusType focus_type) {
   if (edit_control_owner_)
-    edit_control_owner_->DidFocusOnControl();
+    edit_control_owner_->DidFocusOnControl(focus_type);
 }
 
 void DateTimeEditElement::DisabledStateChanged() {
   UpdateUIState();
 }
 
 DateTimeFieldElement* DateTimeEditElement::FieldAt(size_t field_index) const {
   return field_index < fields_.size() ? fields_[field_index].Get() : 0;
 }
 
@@ skipping 250 matching lines @@
 }
 
 DateTimeFieldsState DateTimeEditElement::ValueAsDateTimeFieldsState() const {
   DateTimeFieldsState date_time_fields_state;
   for (const auto& field : fields_)
     field->PopulateDateTimeFieldsState(date_time_fields_state);
   return date_time_fields_state;
 }
 
 }  // namespace blink