Remove extension group from DOMWrapperWorld.

third_party/WebKit/public/web/WebContentSettingsClient.h

Index: third_party/WebKit/public/web/WebContentSettingsClient.h
diff --git a/third_party/WebKit/public/web/WebContentSettingsClient.h b/third_party/WebKit/public/web/WebContentSettingsClient.h
index 933c372209e1f8e020afcef3683678974868a121..b0ae806f4e1e7d93b0fadb165181fa314563ddf0 100644
--- a/third_party/WebKit/public/web/WebContentSettingsClient.h
+++ b/third_party/WebKit/public/web/WebContentSettingsClient.h
@@ -66,22 +66,6 @@ class WebContentSettingsClient {
     return enabledPerSettings;
   }
 
-  // Controls whether the given script extension should run in a new script
-  // context in this frame. If extensionGroup is 0, the script context is the
-  // frame's main context. Otherwise, it is a context created by
-  // WebLocalFrame::executeScriptInIsolatedWorld with that same extensionGroup
-  // value.
-  virtual bool allowScriptExtension(const WebString& extensionName,
-                                    int extensionGroup) {
-    return true;
-  }
-
-  virtual bool allowScriptExtension(const WebString& extensionName,
-                                    int extensionGroup,
-                                    int worldId) {
-    return allowScriptExtension(extensionName, extensionGroup);
-  }
-
   // Controls whether HTML5 Web Storage is allowed for this frame.
   // If local is true, then this is for local storage, otherwise it's for
   // session storage.