Replace a bunch of hardcoded URLs with constants from url_constants.h...

chrome/browser/tab_contents/tab_contents.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/tab_contents/tab_contents.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/file_version_info.h"
 #include "base/process_util.h"
@@ skipping 856 matching lines @@
     return;
   }
   render_view_host()->SetInitialFocus(reverse);
 }
 
 bool TabContents::FocusLocationBarByDefault() {
   DOMUI* dom_ui = GetDOMUIForCurrentState();
   if (dom_ui)
     return dom_ui->focus_location_bar_by_default();
   NavigationEntry* entry = controller_.GetActiveEntry();
-  if (entry && entry->url() == GURL("about:blank"))
+  if (entry && entry->url() == GURL(chrome::kAboutBlankURL))
     return true;
   return false;
 }
 
 void TabContents::AddInfoBar(InfoBarDelegate* delegate) {
   // Look through the existing InfoBarDelegates we have for a match. If we've
   // already got one that matches, then we don't add the new one.
   for (int i = 0; i < infobar_delegate_count(); ++i) {
     if (GetInfoBarDelegateAt(i)->EqualsDelegate(delegate))
       return;
@@ skipping 1620 matching lines @@
 
     default:
       NOTREACHED();
   }
 }
 
 void TabContents::set_encoding(const std::string& encoding) {
   encoding_ = CharacterEncoding::GetCanonicalEncodingNameByAliasName(encoding);
 }