Add user preferences for Contextual Search.

chrome/common/pref_names.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/common/pref_names.h"
 
 #include "base/basictypes.h"
 #include "chrome/common/pref_font_webkit_names.h"
 
 namespace prefs {
@@ skipping 335 matching lines @@
 // Enum that specifies whether Incognito mode is:
 // 0 - Enabled. Default behaviour. Default mode is available on demand.
 // 1 - Disabled. Used cannot browse pages in Incognito mode.
 // 2 - Forced. All pages/sessions are forced into Incognito.
 const char kIncognitoModeAvailability[] = "incognito.mode_availability";
 
 // Boolean that is true when Suggest support is enabled.
 const char kSearchSuggestEnabled[] = "search.suggest_enabled";
 
 #if defined(OS_ANDROID)
-// Integer indicating the Contextual Search enabled state.
-// -1 - opt-out (disabled)
-//  0 - undecided
-//  1 - opt-in (enabled)
+// A string pref set to indicate contextual search enabled status.
 const char kContextualSearchEnabled[] = "search.contextual_search_enabled";
 #endif
 
 // Boolean that indicates whether the browser should put up a confirmation
 // window when the user is attempting to quit. Mac only.
 const char kConfirmToQuitEnabled[] = "browser.confirm_to_quit";
 
 // OBSOLETE.  Enum that specifies whether to enforce a third-party cookie
 // blocking policy.  This has been superseded by kDefaultContentSettings +
 // kBlockThirdPartyCookies.
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 // The number of seconds since epoch that the OS password was last changed.
 const char kOsPasswordLastChanged[] =
     "password_manager.os_password_last_changed";
 #endif
 
 // Whether DNS Quick Check is disabled in proxy resolution.
 const char kQuickCheckEnabled[] = "proxy.quick_check_enabled";
 
 }  // namespace prefs