Delete blimp/helium and remove references to it from dependent targets

blimp/helium/result_unittest.cc

-// Copyright 2016 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 "blimp/helium/result.h"
-
-#include "base/macros.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace blimp {
-namespace helium {
-namespace {
-
-class ResultTest : public testing::Test {
- public:
-  ResultTest() {}
-  ~ResultTest() override {}
-};
-
-TEST_F(ResultTest, ResultToStringWorks) {
-  // The exhaustive list of errors need not be specified here, but enough are
-  // specified that we can verify that the switch/case mapping works as
-  // intended.
-  EXPECT_STREQ("SUCCESS", ResultToString(Result::SUCCESS));
-  EXPECT_STREQ("ERR_DISCONNECTED", ResultToString(Result::ERR_DISCONNECTED));
-}
-
-}  // namespace
-}  // namespace helium
-}  // namespace blimp