Remove kDisableDownloadNotification and stop compiling shelf code on

chrome/browser/ui/browser.cc

 // Copyright 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 "chrome/browser/ui/browser.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <string>
@@ skipping 2544 matching lines @@
   if (hosted_app_controller_)
     return hosted_app_controller_->should_use_web_app_frame();
 
   return false;
 }
 
 bool Browser::SupportsWindowFeatureImpl(WindowFeature feature,
                                         bool check_fullscreen) const {
   bool hide_ui_for_fullscreen = check_fullscreen && ShouldHideUIForFullscreen();
 
-  unsigned int features = FEATURE_INFOBAR | FEATURE_DOWNLOADSHELF;
+  unsigned int features = FEATURE_INFOBAR;
 
   if (is_type_tabbed())
     features |= FEATURE_BOOKMARKBAR;
 
   if (!hide_ui_for_fullscreen) {
     if (!is_type_tabbed())
       features |= FEATURE_TITLEBAR;
 
     if (is_type_tabbed())
       features |= FEATURE_TABSTRIP;
@@ skipping 154 matching lines @@
   if (contents && !allow_js_access) {
     contents->web_contents()->GetController().LoadURL(
         target_url,
         content::Referrer(),
         ui::PAGE_TRANSITION_LINK,
         std::string());  // No extra headers.
   }
 
   return contents != NULL;
 }