Fix unittest-only leak in ExtensionSettingsUIWrapper.

chrome/browser/extensions/extension_settings_ui_wrapper.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/extension_settings_ui_wrapper.h"
 
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "chrome/browser/extensions/extension_settings.h"
 #include "content/browser/browser_thread.h"
@@ skipping 40 matching lines @@
 }
 
 void ExtensionSettingsUIWrapper::Core::RunWithSettingsOnFileThread(
     const SettingsCallback& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   DCHECK(extension_settings_);
   callback.Run(extension_settings_);
 }
 
 ExtensionSettingsUIWrapper::Core::~Core() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) ||
-      BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  BrowserThread::DeleteSoon(
-      BrowserThread::FILE, FROM_HERE, extension_settings_);
+  if (BrowserThread::CurrentlyOn(BrowserThread::FILE)) {
+    delete extension_settings_;
+  } else if (BrowserThread::CurrentlyOn(BrowserThread::UI)) {
+    BrowserThread::DeleteSoon(
+        BrowserThread::FILE, FROM_HERE, extension_settings_);
+  } else {
+    NOTREACHED();
+  }
 }