Making window.focus()/blur() work only when there is a user gesture.

chrome/browser/dom_ui/html_dialog_tab_contents_delegate.cc

 // Copyright (c) 2009 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 "chrome/browser/dom_ui/html_dialog_tab_contents_delegate.h"
 
 #include "chrome/browser/browser.h"
 #include "chrome/browser/browser_window.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
@@ skipping 58 matching lines @@
                        initial_pos, user_gesture);
     browser->window()->Show();
   }
 }
 
 void HtmlDialogTabContentsDelegate::ActivateContents(TabContents* contents) {
   // We don't do anything here because there's only one TabContents in
   // this frame and we don't have a TabStripModel.
 }
 
+void HtmlDialogTabContentsDelegate::DeactivateContents(TabContents* contents) {
+  // We don't care about this notification (called when a user gesture triggers
+  // a call to window.blur()).
+}
+
 void HtmlDialogTabContentsDelegate::LoadingStateChanged(TabContents* source) {
   // We don't care about this notification.
 }
 
 void HtmlDialogTabContentsDelegate::CloseContents(TabContents* source) {
   // We receive this message but don't handle it because we really do the
   // cleanup somewhere else (namely, HtmlDialogUIDelegate::OnDialogClosed()).
 }
 
 bool HtmlDialogTabContentsDelegate::IsPopup(const TabContents* source) const {
@@ skipping 10 matching lines @@
 
 void HtmlDialogTabContentsDelegate::UpdateTargetURL(TabContents* source,
                                                     const GURL& url) {
   // Ignored.
 }
 
 bool HtmlDialogTabContentsDelegate::ShouldAddNavigationToHistory() const {
   return false;
 }