Remove BrowserSignin, as it's not used anywhere.

chrome/browser/extensions/extension_webstore_private_api.h

Index: chrome/browser/extensions/extension_webstore_private_api.h
diff --git a/chrome/browser/extensions/extension_webstore_private_api.h b/chrome/browser/extensions/extension_webstore_private_api.h
index 581ddc3d52ed2830e56587c6a931a1f1da902007..035311f0c1ba44e3ecde08e5aaa8a905b4c7d34d 100644
--- a/chrome/browser/extensions/extension_webstore_private_api.h
+++ b/chrome/browser/extensions/extension_webstore_private_api.h
@@ -8,7 +8,6 @@
 
 #include <string>
 
-#include "chrome/browser/browser_signin.h"
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
 #include "chrome/browser/extensions/webstore_install_helper.h"
@@ -23,10 +22,6 @@ class WebstorePrivateApi {
   // Allows you to set the ProfileSyncService the function will use for
   // testing purposes.
   static void SetTestingProfileSyncService(ProfileSyncService* service);
-
-  // Allows you to set the BrowserSignin the function will use for
-  // testing purposes.
-  static void SetTestingBrowserSignin(BrowserSignin* signin);
 };
 
 // TODO(asargent): this is being deprecated in favor of
@@ -146,35 +141,4 @@ class SetStoreLoginFunction : public SyncExtensionFunction {
   DECLARE_EXTENSION_FUNCTION_NAME("webstorePrivate.setStoreLogin");
 };
 
-class PromptBrowserLoginFunction : public AsyncExtensionFunction,
-                                   public NotificationObserver,
-                                   public BrowserSignin::SigninDelegate {
- public:
-  PromptBrowserLoginFunction();
-  // Implements BrowserSignin::SigninDelegate interface.
-  virtual void OnLoginSuccess();
-  virtual void OnLoginFailure(const GoogleServiceAuthError& error);
-
-  // Implements the NotificationObserver interface.
-  virtual void Observe(int type,
-                       const NotificationSource& source,
-                       const NotificationDetails& details);
-
- protected:
-  virtual ~PromptBrowserLoginFunction();
-  virtual bool RunImpl();
-
- private:
-  // Creates the message for signing in.
-  virtual string16 GetLoginMessage();
-
-  // Are we waiting for a token available notification?
-  bool waiting_for_token_;
-
-  // Used for listening for TokenService notifications.
-  NotificationRegistrar registrar_;
-
-  DECLARE_EXTENSION_FUNCTION_NAME("webstorePrivate.promptBrowserLogin");
-};
-
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WEBSTORE_PRIVATE_API_H_