Do not send blur to the original window when JS popup shows.

content/browser/renderer_host/render_widget_host_view_aura.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <set>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 1753 matching lines @@
       // object.
       input_method->SetFocusedTextInputClient(this);
     }
 
     BrowserAccessibilityManager* manager =
         host_->GetRootBrowserAccessibilityManager();
     if (manager)
       manager->OnWindowFocused();
   } else if (window_ == lost_focus) {
     host_->SetActive(false);
-    host_->Blur();
 
     DetachFromInputMethod();
 
     selection_controller_->HideAndDisallowShowingAutomatically();
 
     if (overscroll_controller_)
       overscroll_controller_->Cancel();
 
     BrowserAccessibilityManager* manager =
         host_->GetRootBrowserAccessibilityManager();
@@ skipping 595 matching lines @@
 
 void RenderWidgetHostViewAura::SetPopupChild(
     RenderWidgetHostViewAura* popup_child_host_view) {
   popup_child_host_view_ = popup_child_host_view;
   event_handler_->SetPopupChild(
       popup_child_host_view,
       popup_child_host_view ? popup_child_host_view->event_handler() : nullptr);
 }
 
 }  // namespace content