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

base/files/file_path_watcher_browsertest.cc

Index: base/files/file_path_watcher_browsertest.cc
diff --git a/base/files/file_path_watcher_browsertest.cc b/base/files/file_path_watcher_browsertest.cc
index 5ded1e819398b489c8d31669c58d40adb38008b2..14a25a137f2d5f894f859209f299ef65b287a95c 100644
--- a/base/files/file_path_watcher_browsertest.cc
+++ b/base/files/file_path_watcher_browsertest.cc
@@ -768,8 +768,8 @@ enum Permission {
   Execute
 };
 
+#if defined(OS_MACOSX)
 bool ChangeFilePermissions(const FilePath& path, Permission perm, bool allow) {
-#if defined(OS_POSIX)
   struct stat stat_buf;
 
   if (stat(path.value().c_str(), &stat_buf) != 0)
@@ -796,61 +796,8 @@ bool ChangeFilePermissions(const FilePath& path, Permission perm, bool allow) {
     stat_buf.st_mode &= ~mode;
   }
   return chmod(path.value().c_str(), stat_buf.st_mode) == 0;
-
-#elif defined(OS_WIN)
-  PACL old_dacl;
-  PSECURITY_DESCRIPTOR security_descriptor;
-  if (GetNamedSecurityInfo(const_cast<wchar_t*>(path.value().c_str()),
-                           SE_FILE_OBJECT,
-                           DACL_SECURITY_INFORMATION, NULL, NULL, &old_dacl,
-                           NULL, &security_descriptor) != ERROR_SUCCESS)
-    return false;
-
-  DWORD mode = 0;
-  switch (perm) {
-    case Read:
-      mode = GENERIC_READ;
-      break;
-    case Write:
-      mode = GENERIC_WRITE;
-      break;
-    case Execute:
-      mode = GENERIC_EXECUTE;
-      break;
-    default:
-      ADD_FAILURE() << "unknown perm " << perm;
-      return false;
-  }
-
-  // Deny Read access for the current user.
-  EXPLICIT_ACCESS change;
-  change.grfAccessPermissions = mode;
-  change.grfAccessMode = allow ? GRANT_ACCESS : DENY_ACCESS;
-  change.grfInheritance = 0;
-  change.Trustee.pMultipleTrustee = NULL;
-  change.Trustee.MultipleTrusteeOperation = NO_MULTIPLE_TRUSTEE;
-  change.Trustee.TrusteeForm = TRUSTEE_IS_NAME;
-  change.Trustee.TrusteeType = TRUSTEE_IS_USER;
-  change.Trustee.ptstrName = L"CURRENT_USER";
-
-  PACL new_dacl;
-  if (SetEntriesInAcl(1, &change, old_dacl, &new_dacl) != ERROR_SUCCESS) {
-    LocalFree(security_descriptor);
-    return false;
-  }
-
-  DWORD rc = SetNamedSecurityInfo(const_cast<wchar_t*>(path.value().c_str()),
-                                  SE_FILE_OBJECT, DACL_SECURITY_INFORMATION,
-                                  NULL, NULL, new_dacl, NULL);
-  LocalFree(security_descriptor);
-  LocalFree(new_dacl);
-
-  return rc == ERROR_SUCCESS;
-#else
-  NOTIMPLEMENTED();
-  return false;
-#endif
 }
+#endif  // defined(OS_MACOSX)
 
 #if defined(OS_MACOSX)
 // Linux implementation of FilePathWatcher doesn't catch attribute changes.