Cleanup: Remove some unused code, or make them platform specific.

chrome/browser/autocomplete/autocomplete_controller.cc

 // 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.
 
 #include "chrome/browser/autocomplete/autocomplete_controller.h"
 
 #include <set>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 133 matching lines @@
 }
 
 // Whether this autocomplete match type supports custom descriptions.
 bool AutocompleteMatchHasCustomDescription(const AutocompleteMatch& match) {
   return match.type == AutocompleteMatchType::SEARCH_SUGGEST_ENTITY ||
       match.type == AutocompleteMatchType::SEARCH_SUGGEST_PROFILE;
 }
 
 }  // namespace
 
-const int AutocompleteController::kNoItemSelected = -1;
-
 AutocompleteController::AutocompleteController(
     Profile* profile,
     AutocompleteControllerDelegate* delegate,
     int provider_types)
     : delegate_(delegate),
       history_url_provider_(NULL),
       keyword_provider_(NULL),
       search_provider_(NULL),
       zero_suggest_provider_(NULL),
       stop_timer_duration_(OmniboxFieldTrial::StopTimerFieldTrialDuration()),
@@ skipping 481 matching lines @@
                         this, &AutocompleteController::ExpireCopiedEntries);
 }
 
 void AutocompleteController::StartStopTimer() {
   stop_timer_.Start(FROM_HERE,
                     stop_timer_duration_,
                     base::Bind(&AutocompleteController::Stop,
                                base::Unretained(this),
                                false));
 }