Introduce //components/user_prefs.
The user_prefs component provides:
a) The UserPrefs class, used to map PrefService objects to BrowserContext. This addresses a TODO to get rid of PrefServiceFromBrowserContext from base/prefs/pref_service.h, where clearly a mention of a content class did not belong.
b) A place for PrefRegistrySyncable to live, where it can be used by components that need to register prefs.
We also use (b) in this change to eliminate Autofill's dependency on chrome/browser/prefs. Work is ongoing to move Autofill to //components/autofill.
[email protected]
BUG=155525,140037
Review URL: https://chromiumcodereview.appspot.com/12340111
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@186301 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/components/user_prefs/user_prefs.h b/components/user_prefs/user_prefs.h
new file mode 100644
index 0000000..1919748
--- /dev/null
+++ b/components/user_prefs/user_prefs.h
@@ -0,0 +1,49 @@
+// Copyright 2013 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 COMPONENTS_USER_PREFS_USER_PREFS_H_
+#define COMPONENTS_USER_PREFS_USER_PREFS_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/supports_user_data.h"
+#include "components/user_prefs/user_prefs_export.h"
+
+class PrefService;
+
+namespace content {
+class BrowserContext;
+}
+
+namespace components {
+
+// Components may use preferences associated with a given user. These
+// hang off of content::BrowserContext and can be retrieved using
+// UserPrefs::Get().
+//
+// It is up to the embedder tof create and own the PrefService and
+// attach it to BrowserContext using the UserPrefs::Set() function.
+class USER_PREFS_EXPORT UserPrefs : public base::SupportsUserData::Data {
+ public:
+ // Retrieves the PrefService for a given BrowserContext, or NULL if
+ // none is attached.
+ static PrefService* Get(content::BrowserContext* context);
+
+ // Hangs the specified |prefs| off of |context|. Should be called
+ // only once per BrowserContext.
+ static void Set(content::BrowserContext* context, PrefService* prefs);
+
+ private:
+ UserPrefs(PrefService* prefs);
+ virtual ~UserPrefs();
+
+ // Non-owning; owned by embedder.
+ PrefService* prefs_;
+
+ DISALLOW_COPY_AND_ASSIGN(UserPrefs);
+};
+
+} // namespace components
+
+#endif // COMPONENTS_USER_PREFS_USER_PREFS_H_
