Introduces 'context' param to NotifierSettingsView.

ui/message_center/message_center.h

Index: ui/message_center/message_center.h
diff --git a/ui/message_center/message_center.h b/ui/message_center/message_center.h
index 53bb1d02eb9239ce50be145994a09a2195bb11d4..38504899ad2e0072c0f5fcfcbcd3a1e8163b75bd 100644
--- a/ui/message_center/message_center.h
+++ b/ui/message_center/message_center.h
@@ -9,6 +9,7 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
+#include "ui/gfx/native_widget_types.h"
 #include "ui/message_center/message_center_export.h"
 #include "ui/message_center/notification_list.h"
 #include "ui/notifications/notification_types.h"
@@ -58,6 +59,10 @@ class MESSAGE_CENTER_EXPORT MessageCenter : public NotificationList::Delegate {
     // to identify the requesting browser context).
     virtual void ShowSettings(const std::string& notification_id) = 0;
 
+    // Request to show the notification settings dialog. |context| is necessary
+    // to create a new window.
+    virtual void ShowSettingsDialog(gfx::NativeView context) = 0;
+
     // Called when the notification body is clicked on.
     virtual void OnClicked(const std::string& notification_id) = 0;
 
@@ -140,6 +145,7 @@ class MESSAGE_CENTER_EXPORT MessageCenter : public NotificationList::Delegate {
   virtual void DisableNotificationByExtension(const std::string& id) OVERRIDE;
   virtual void DisableNotificationByUrl(const std::string& id) OVERRIDE;
   virtual void ShowNotificationSettings(const std::string& id) OVERRIDE;
+  virtual void ShowNotificationSettingsDialog(gfx::NativeView context) OVERRIDE;
   virtual void OnNotificationClicked(const std::string& id) OVERRIDE;
   virtual void OnQuietModeChanged(bool quiet_mode) OVERRIDE;
   virtual void OnButtonClicked(const std::string& id, int button_index)