Remove all blimp engine code

blimp/engine/common/blimp_browser_context_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/engine/common/blimp_browser_context.h"
-
-#include "base/metrics/user_metrics.h"
-#include "base/threading/thread_task_runner_handle.h"
-#include "components/metrics/metrics_service.h"
-#include "content/public/browser/notification_service.h"
-#include "content/public/test/test_browser_thread_bundle.h"
-#include "net/log/net_log.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace blimp {
-namespace engine {
-
-class BlimpBrowserContextTest : public testing::Test {
- public:
-  BlimpBrowserContextTest() {}
-
- protected:
-  void SetUp() override {
-    // Set up NotificationService for StabilityMetricsHelper to use.
-    notification_service_.reset(content::NotificationService::Create());
-
-    base::SetRecordActionTaskRunner(base::ThreadTaskRunnerHandle::Get());
-
-    // Create BlimpBrowserContext.
-    browser_context_.reset(new BlimpBrowserContext(false /* off_the_record */,
-                                                   &net_log_));
-  }
-
-  void TearDown() override {
-    // Clears static variable in MetricsService
-    metrics::MetricsService::SetExecutionPhase(
-        metrics::MetricsService::UNINITIALIZED_PHASE,
-        browser_context_->GetPrefService());
-  }
-
- private:
-  content::TestBrowserThreadBundle thread_bundle_;
-  std::unique_ptr<content::NotificationService> notification_service_;
-  net::NetLog net_log_;
-  std::unique_ptr<BlimpBrowserContext> browser_context_;
-
-  DISALLOW_COPY_AND_ASSIGN(BlimpBrowserContextTest);
-};
-
-TEST_F(BlimpBrowserContextTest, CtorDtor) {
-  // Covers construction and destruction of BlimpBrowserContext and
-  // associated metrics setup and teardown.
-}
-
-}  // namespace engine
-}  // namespace blimp