Don't focus the location bar for NTP navigations in non-selected tabs.

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 1529 matching lines @@
   if (IsFastTabUnloadEnabled()) {
     *proceed_to_fire_unload =
         fast_unload_controller_->BeforeUnloadFired(web_contents, proceed);
   } else {
     *proceed_to_fire_unload =
         unload_controller_->BeforeUnloadFired(web_contents, proceed);
   }
 }
 
 bool Browser::ShouldFocusLocationBarByDefault(WebContents* source) {
+  // Navigations in background tabs shouldn't change the focus state of the
+  // omnibox, since it's associated with the foreground tab.
+  if (source != tab_strip_model_->GetActiveWebContents())
+    return false;
+
   const content::NavigationEntry* entry =
       source->GetController().GetActiveEntry();
   if (entry) {
     const GURL& url = entry->GetURL();
     const GURL& virtual_url = entry->GetVirtualURL();
     if ((url.SchemeIs(content::kChromeUIScheme) &&
          url.host_piece() == chrome::kChromeUINewTabHost) ||
         (virtual_url.SchemeIs(content::kChromeUIScheme) &&
          virtual_url.host_piece() == chrome::kChromeUINewTabHost)) {
       return true;
@@ skipping 1036 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;
 }