Create and integrate a metrics service client into Blimp engine.

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/message_loop/message_loop.h"
+#include "base/metrics/user_metrics.h"
+#include "components/metrics/metrics_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 {
+    base::SetRecordActionTaskRunner(
+        base::MessageLoop::current()->task_runner());
+    // 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_;
+  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