Add ContentSettingsProvider Interface.

chrome/browser/content_settings/policy_content_settings_provider.h

Index: chrome/browser/content_settings/policy_content_settings_provider.h
diff --git a/chrome/browser/content_settings/policy_content_settings_provider.h b/chrome/browser/content_settings/policy_content_settings_provider.h
index 3aad0437cd97739eb427507fb4582f2031a2e49d..87da4711cfc6fc3614daf3a5c8579dd4e44dcbe6 100644
--- a/chrome/browser/content_settings/policy_content_settings_provider.h
+++ b/chrome/browser/content_settings/policy_content_settings_provider.h
@@ -20,11 +20,14 @@ class DictionaryValue;
 class PrefService;
 class Profile;
 
-class PolicyContentSettingsProvider : public DefaultContentSettingsProvider,
-                                      public NotificationObserver {
+namespace content_settings {
+
+class PolicyDefaultContentSettingsProvider
+    : public DefaultContentSettingsProvider,
+      public NotificationObserver {
  public:
-  explicit PolicyContentSettingsProvider(Profile* profile);
-  virtual ~PolicyContentSettingsProvider();
+  explicit PolicyDefaultContentSettingsProvider(Profile* profile);
+  virtual ~PolicyDefaultContentSettingsProvider();
 
   // DefaultContentSettingsProvider implementation.
   virtual bool CanProvideDefaultSetting(ContentSettingsType content_type) const;
@@ -72,7 +75,9 @@ class PolicyContentSettingsProvider : public DefaultContentSettingsProvider,
   PrefChangeRegistrar pref_change_registrar_;
   NotificationRegistrar notification_registrar_;
 
-  DISALLOW_COPY_AND_ASSIGN(PolicyContentSettingsProvider);
+  DISALLOW_COPY_AND_ASSIGN(PolicyDefaultContentSettingsProvider);
 };
 
+}  // namespace content_settings
+
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_POLICY_CONTENT_SETTINGS_PROVIDER_H_