Mac: Some clang appeasing.

chrome/browser/autocomplete/autocomplete_popup_model.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/autocomplete/autocomplete_popup_model.h"
 
 #include "base/string_util.h"
 #include "chrome/browser/autocomplete/autocomplete_edit.h"
 #include "chrome/browser/autocomplete/autocomplete_popup_view.h"
 #include "chrome/browser/profile.h"
@@ skipping 257 matching lines @@
 }
 
 void AutocompletePopupModel::Observe(NotificationType type,
                                      const NotificationSource& source,
                                      const NotificationDetails& details) {
   DCHECK_EQ(NotificationType::AUTOCOMPLETE_CONTROLLER_RESULT_UPDATED,
             type.value);
 
   const AutocompleteResult* result =
       Details<const AutocompleteResult>(details).ptr();
-  selected_line_ = (result->default_match() == result->end()) ?
-      kNoMatch : (result->default_match() - result->begin());
+  selected_line_ = result->default_match() == result->end() ?
+      kNoMatch : static_cast<size_t>(result->default_match() - result->begin());
   // There had better not be a nonempty result set with no default match.
   CHECK((selected_line_ != kNoMatch) || result->empty());
   // If we're going to trim the window size to no longer include the hovered
   // line, turn hover off.  Practically, this shouldn't happen, but it
   // doesn't hurt to be defensive.
   if ((hovered_line_ != kNoMatch) && (result->size() <= hovered_line_))
     SetHoveredLine(kNoMatch);
 
   view_->UpdatePopupAppearance();
 }
 
 const SkBitmap* AutocompletePopupModel::GetSpecialIconForMatch(
     const AutocompleteMatch& match) const {
   if (!match.template_url || !match.template_url->IsExtensionKeyword())
     return NULL;
 
   return &profile_->GetExtensionsService()->GetOmniboxIcon(
       match.template_url->GetExtensionId());
 }