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

chrome/browser/extensions/browser_permissions_policy_delegate_unittest.cc

Index: chrome/browser/extensions/browser_permissions_policy_delegate_unittest.cc
diff --git a/chrome/browser/extensions/browser_permissions_policy_delegate_unittest.cc b/chrome/browser/extensions/browser_permissions_policy_delegate_unittest.cc
index 7599b7fb8ad1eec3a59ee20c1d9118eb0b587dd3..6174b6e6df1026a39d60d496e94ae0b8e4e97851 100644
--- a/chrome/browser/extensions/browser_permissions_policy_delegate_unittest.cc
+++ b/chrome/browser/extensions/browser_permissions_policy_delegate_unittest.cc
@@ -37,6 +37,7 @@ class BrowserPermissionsPolicyDelegateTest : public testing::Test {
   TestingProfile* profile_;
 };
 
+#if !defined(OS_CHROMEOS)
 scoped_refptr<const Extension> CreateTestExtension(const std::string& id) {
   return ExtensionBuilder()
       .SetManifest(DictionaryBuilder()
@@ -47,6 +48,7 @@ scoped_refptr<const Extension> CreateTestExtension(const std::string& id) {
       .SetID(id)
       .Build();
 }
+#endif
 
 }  // namespace