components: Move PrefRegistrySyncable into user_prefs namespace.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 0ab32b79fa36fd93006761acd826a5ca9fe829cd..468699a066512a85c44640105fda39ff0b5a5b67 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -468,16 +468,19 @@ ChromeContentBrowserClient::~ChromeContentBrowserClient() {
 
 // static
 void ChromeContentBrowserClient::RegisterUserPrefs(
-    PrefRegistrySyncable* registry) {
-  registry->RegisterBooleanPref(prefs::kDisable3DAPIs,
-                                false,
-                                PrefRegistrySyncable::UNSYNCABLE_PREF);
-  registry->RegisterBooleanPref(prefs::kEnableHyperlinkAuditing,
-                                true,
-                                PrefRegistrySyncable::UNSYNCABLE_PREF);
-  registry->RegisterBooleanPref(prefs::kEnableMemoryInfo,
-                                false,
-                                PrefRegistrySyncable::UNSYNCABLE_PREF);
+    user_prefs::PrefRegistrySyncable* registry) {
+  registry->RegisterBooleanPref(
+      prefs::kDisable3DAPIs,
+      false,
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(
+      prefs::kEnableHyperlinkAuditing,
+      true,
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(
+      prefs::kEnableMemoryInfo,
+      false,
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 // static