Disable selection on aura. Clipboard semantics on aura must be same as windows

chrome/browser/extensions/extension_clipboard_apitest.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 "base/command_line.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/common/chrome_switches.h"
 
 class ExtensionClipboardApiTest : public ExtensionApiTest {
   virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
     CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kEnableExperimentalExtensionApis);
 
     ExtensionApiTest::SetUpInProcessBrowserTestFixture();
   }
 };
 
 IN_PROC_BROWSER_TEST_F(ExtensionClipboardApiTest, WriteAndReadTest) {
-#if defined(OS_WIN)
+#if defined(OS_WIN) || defined(USE_AURA)
   ASSERT_TRUE(RunExtensionTest("clipboard_api/extension_win")) << message_;
-#else  // !defined(OS_WIN)
-#if defined(OS_MACOSX)
+#elif defined(OS_MACOSX)
   ASSERT_TRUE(RunExtensionTest("clipboard_api/extension_mac")) << message_;
-#else  // !defined(OS_WIN) && !defined(OS_MACOSX)
+#else  // !defined(OS_WIN) && !defined(OS_MACOSX) && !defined(USE_AURA)
   ASSERT_TRUE(RunExtensionTest("clipboard_api/extension"))  << message_;
-#endif  // defined(OS_MACOSX)
-#endif  // defiend(OS_WIN)
+#endif
 };
 
 IN_PROC_BROWSER_TEST_F(ExtensionClipboardApiTest, NoPermission) {
   ASSERT_FALSE(RunExtensionTest("clipboard_api/extension_no_permission"))
       << message_;
 };