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

chrome/browser/tab_contents/tab_contents_delegate.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/tab_contents/tab_contents_delegate.h"
 
 #include "gfx/rect.h"
 
 void TabContentsDelegate::DetachContents(TabContents* source) {
 }
@@ skipping 52 matching lines @@
 TabContentsDelegate::CreateExtensionFunctionDispatcher(
     RenderViewHost* render_view_host,
     const std::string& extension_id) {
   return NULL;
 }
 
 bool TabContentsDelegate::TakeFocus(bool reverse) {
   return false;
 }
 
-void TabContentsDelegate::Activate() {
-}
-
-void TabContentsDelegate::Deactivate(){
-}
-
 void TabContentsDelegate::SetTabContentBlocked(
     TabContents* contents, bool blocked) {
 }
 
 void TabContentsDelegate::TabContentsFocused(TabContents* tab_content) {
 }
 
 int TabContentsDelegate::GetExtraRenderViewHeight() const {
   return 0;
 }
@@ skipping 78 matching lines @@
 }
 
 void TabContentsDelegate::ContentTypeChanged(TabContents* source) {
 }
 
 void TabContentsDelegate::CommitMatchPreview(TabContents* source) {
 }
 
 TabContentsDelegate::~TabContentsDelegate() {
 }