Remove auto raw pointer deduction from non-linux specific code.

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.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/autocomplete_text_field_cell.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
@@ skipping 178 matching lines @@
 
 - (BOOL)shouldDrawBezel {
   return YES;
 }
 
 - (CGFloat)lineHeight {
   return 17;
 }
 
 - (void)clearTrackingArea {
-  for (auto& decoration : mouseTrackingDecorations_)
+  for (auto* decoration : mouseTrackingDecorations_)
     decoration->RemoveTrackingArea();
 
   mouseTrackingDecorations_.clear();
 }
 
 - (void)clearDecorations {
   leadingDecorations_.clear();
   trailingDecorations_.clear();
   [self clearTrackingArea];
 }
@@ skipping 528 matching lines @@
 
 @end
 
 @implementation AutocompleteTextFieldCell (TestingAPI)
 
 - (const std::vector<LocationBarDecoration*>&)mouseTrackingDecorations {
   return mouseTrackingDecorations_;
 }
 
 @end