components: Move PrefRegistrySyncable into user_prefs namespace.

chrome/browser/search/search.h

 // Copyright 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.
 
 #ifndef CHROME_BROWSER_SEARCH_SEARCH_H_
 #define CHROME_BROWSER_SEARCH_SEARCH_H_
 
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/string16.h"
 
 class GURL;
-class PrefRegistrySyncable;
 class Profile;
 class TemplateURL;
 class TemplateURLRef;
 
 namespace content {
 class NavigationEntry;
 class WebContents;
 }
 
+namespace user_prefs {
+class PrefRegistrySyncable;
+}
+
 namespace chrome {
 
 // Use this value for "start margin" to prevent the "es_sm" parameter from
 // being used.
 extern const int kDisableStartMargin;
 
 // Returns whether the Instant Extended API is enabled.
 bool IsInstantExtendedAPIEnabled();
 
 // Returns the value to pass to the &espv CGI parameter when loading the
@@ skipping 29 matching lines @@
 // search provider but does not have any search terms is considered an Instant
 // New Tab Page.
 bool IsInstantNTP(const content::WebContents* contents);
 
 // Same as IsInstantNTP but uses |nav_entry| to determine the URL for the page
 // instead of using the visible entry.
 bool NavEntryIsInstantNTP(const content::WebContents* contents,
                           const content::NavigationEntry* nav_entry);
 
 // Registers Instant-related user preferences. Called at startup.
-void RegisterInstantUserPrefs(PrefRegistrySyncable* registry);
+void RegisterInstantUserPrefs(user_prefs::PrefRegistrySyncable* registry);
 
 // Returns prefs::kInstantExtendedEnabled in extended mode;
 // prefs::kInstantEnabled otherwise.
 const char* GetInstantPrefName();
 
 // Sets the default value of prefs::kInstantExtendedEnabled, based on field
 // trials and the current value of prefs::kInstantEnabled.
 void SetInstantExtendedPrefDefault(Profile* profile);
 
 // Returns whether the Instant checkbox in chrome://settings/ should be enabled
@@ skipping 102 matching lines @@
                                        const TemplateURLRef& ref,
                                        int start_margin);
 
 // Returns whether the default search provider has a valid Instant URL in its
 // template. Exposed for testing only.
 bool DefaultSearchProviderSupportsInstant(Profile* profile);
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_SEARCH_SEARCH_H_