A simple version of search term replacement for testing .

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm

 // Copyright (c) 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.
 
 #import "chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/stl_util.h"
@@ skipping 386 matching lines @@
     return;
   RefreshPageActionDecorations();
   Layout();
 
   PageActionDecoration* decoration = GetPageActionDecoration(page_action);
   DCHECK(decoration);
   if (!decoration)
     return;
 
   decoration->set_preview_enabled(preview_enabled);
-  decoration->UpdateVisibility(contents, GURL(toolbar_model_->GetText()));
+  decoration->UpdateVisibility(contents, toolbar_model_->GetURL());
 }
 
 NSRect LocationBarViewMac::GetPageActionFrame(ExtensionAction* page_action) {
   PageActionDecoration* decoration = GetPageActionDecoration(page_action);
   if (!decoration)
     return NSZeroRect;
 
   AutocompleteTextFieldCell* cell = [field_ cell];
   NSRect frame = [cell frameForDecoration:decoration inFrame:[field_ bounds]];
   return frame;
@@ skipping 228 matching lines @@
 
   if (new_page_actions != page_actions_) {
     page_actions_.swap(new_page_actions);
     DeletePageActionDecorations();
     for (size_t i = 0; i < page_actions_.size(); ++i) {
       page_action_decorations_.push_back(
           new PageActionDecoration(this, browser_, page_actions_[i]));
     }
   }
 
-  GURL url = GURL(toolbar_model_->GetText());
+  GURL url = toolbar_model_->GetURL();
   for (size_t i = 0; i < page_action_decorations_.size(); ++i) {
     page_action_decorations_[i]->UpdateVisibility(
         toolbar_model_->input_in_progress() ?
             NULL : tab_contents->web_contents(),
         url);
   }
 }
 
 // TODO(shess): This function should over time grow to closely match
 // the views Layout() function.
@@ skipping 94 matching lines @@
   command_updater_->UpdateCommandEnabled(IDC_CHROME_TO_MOBILE_PAGE, enabled);
 }
 
 void LocationBarViewMac::UpdateZoomDecoration() {
   TabContents* tab_contents = GetTabContents();
   if (!tab_contents)
     return;
 
   zoom_decoration_->Update(tab_contents->zoom_controller());
 }