Revert of Unload the ScopedGaiaAuthExtension asynchronously.

chrome/browser/extensions/signin/scoped_gaia_auth_extension.cc

Index: chrome/browser/extensions/signin/scoped_gaia_auth_extension.cc
diff --git a/chrome/browser/extensions/signin/scoped_gaia_auth_extension.cc b/chrome/browser/extensions/signin/scoped_gaia_auth_extension.cc
index 0df35cb5597b449268285db7ae3ecaa7ab67da0a..49d6fa2be8503e4b9936a46d654461fbfcf9db15 100644
--- a/chrome/browser/extensions/signin/scoped_gaia_auth_extension.cc
+++ b/chrome/browser/extensions/signin/scoped_gaia_auth_extension.cc
@@ -4,10 +4,6 @@
 
 #include "chrome/browser/extensions/signin/scoped_gaia_auth_extension.h"
 
-#include "base/bind.h"
-#include "base/location.h"
-#include "base/single_thread_task_runner.h"
-#include "base/thread_task_runner_handle.h"
 #include "chrome/browser/extensions/signin/gaia_auth_extension_loader.h"
 #include "content/public/browser/browser_context.h"
 
@@ -23,15 +19,6 @@
 ScopedGaiaAuthExtension::~ScopedGaiaAuthExtension() {
   extensions::GaiaAuthExtensionLoader* loader =
       extensions::GaiaAuthExtensionLoader::Get(browser_context_);
-  if (loader) {
-    // Post this instead of calling it directly, to ensure that the
-    // RenderFrameHost is not used after being destroyed. This would happen,
-    // for example, if we tried to manually navigate to the extension while
-    // the <webview> containing the Gaia sign in page (and therefore the
-    // extension) was the active tab. See crbug.com/460431.
-    base::ThreadTaskRunnerHandle::Get()->PostTask(
-        FROM_HERE,
-        base::Bind(&extensions::GaiaAuthExtensionLoader::UnloadIfNeeded,
-                   base::Unretained(loader)));
-  }
+  if (loader)
+    loader->UnloadIfNeeded();
 }