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

chrome/browser/browser.cc

 // Copyright (c) 2010 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/browser.h"
 
 #if defined(OS_WIN)
 #include <shellapi.h>
 #include <windows.h>
 #endif  // OS_WIN
@@ skipping 2641 matching lines @@
                                             TabStripModel::ADD_NONE);
   }
 }
 
 void Browser::ActivateContents(TabContents* contents) {
   tabstrip_model_.SelectTabContentsAt(
       tabstrip_model_.GetIndexOfTabContents(contents), false);
   window_->Activate();
 }
 
+void Browser::DeactivateContents(TabContents* contents) {
+  window_->Deactivate();
+}
+
 void Browser::LoadingStateChanged(TabContents* source) {
   window_->UpdateLoadingAnimations(tabstrip_model_.TabsAreLoading());
   window_->UpdateTitleBar();
 
   if (source == GetSelectedTabContents()) {
     UpdateReloadStopState(source->is_loading(), false);
     if (GetStatusBubble())
       GetStatusBubble()->SetStatus(GetSelectedTabContents()->GetStatusText());
 
     if (source->is_loading())
@@ skipping 123 matching lines @@
 }
 
 bool Browser::TakeFocus(bool reverse) {
   NotificationService::current()->Notify(
       NotificationType::FOCUS_RETURNED_TO_BROWSER,
       Source<Browser>(this),
       NotificationService::NoDetails());
   return false;
 }
 
-void Browser::Activate() {
-  window_->Activate();
-}
-
-void Browser::Deactivate() {
-  window_->Deactivate();
-}
-
 bool Browser::IsApplication() const {
   return (type_ & TYPE_APP) != 0;
 }
 
 void Browser::ConvertContentsToApplication(TabContents* contents) {
   const GURL& url = contents->controller().GetActiveEntry()->url();
   std::string app_name = web_app::GenerateApplicationNameFromURL(url);
   RegisterAppPrefs(app_name);
 
   DetachContents(contents);
@@ skipping 1204 matching lines @@
 }
 
 void Browser::TabRestoreServiceDestroyed(TabRestoreService* service) {
   if (!tab_restore_service_)
     return;
 
   DCHECK_EQ(tab_restore_service_, service);
   tab_restore_service_->RemoveObserver(this);
   tab_restore_service_ = NULL;
 }