Fixes for -Wunused-function on Linux, Android and ChromeOS

chrome/browser/extensions/browser_permissions_policy_delegate_unittest.cc

 // Copyright 2013 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/signin/signin_manager.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/permissions/permissions_data.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "chrome/test/base/testing_profile.h"
@@ skipping 19 matching lines @@
     // Need to delete profile here before the UI thread is destroyed.
     profile_manager_->DeleteTestingProfile("test");
     profile_manager_.reset();
   }
  protected:
   content::TestBrowserThreadBundle thread_bundle_;
   scoped_ptr<TestingProfileManager> profile_manager_;
   TestingProfile* profile_;
 };
 
+#if !defined(OS_CHROMEOS)
 scoped_refptr<const Extension> CreateTestExtension(const std::string& id) {
   return ExtensionBuilder()
       .SetManifest(DictionaryBuilder()
           .Set("name", "Extension with ID " + id)
           .Set("version", "1.0")
           .Set("manifest_version", 2)
           .Set("permissions", ListBuilder().Append("<all_urls>")))
       .SetID(id)
       .Build();
 }
+#endif
 
 }  // namespace
 
 #if !defined(OS_CHROMEOS)
 // Tests that CanExecuteScriptOnPage returns false for the signin process,
 // all else being equal.
 TEST_F(BrowserPermissionsPolicyDelegateTest, CanExecuteScriptOnPage) {
   GURL kSigninUrl(
       "https://accounts.google.com/ServiceLogin?service=chromiumsync");
   ASSERT_TRUE(SigninManager::IsWebBasedSigninFlowURL(kSigninUrl));
@@ skipping 20 matching lines @@
                                                        kSigninUrl,
                                                        kSigninUrl,
                                                        -1,
                                                        NULL,
                                                        signin_process.GetID(),
                                                        &error)) << error;
 }
 #endif
 
 }  // namespace extensions