extensions: Refactor ExtensionInstallUI class.

chrome/browser/extensions/extension_browsertest.cc

Index: chrome/browser/extensions/extension_browsertest.cc
diff --git a/chrome/browser/extensions/extension_browsertest.cc b/chrome/browser/extensions/extension_browsertest.cc
index a644eb7350ae1cfc2a7d35df9e9af0810e6e5601..bbadbfa4244fc577171159c887ab6b8c975bf1a9 100644
--- a/chrome/browser/extensions/extension_browsertest.cc
+++ b/chrome/browser/extensions/extension_browsertest.cc
@@ -175,9 +175,6 @@ class MockAbortExtensionInstallUI : public ExtensionInstallUI {
     MessageLoopForUI::current()->Quit();
   }
 
-  virtual void ConfirmUninstall(Delegate* delegate,
-                                const Extension* extension) {}
-
   virtual void OnInstallSuccess(const Extension* extension, SkBitmap* icon) {}
 
   virtual void OnInstallFailure(const std::string& error) {}