Create and integrate a metrics service client into Blimp engine.

blimp/engine/app/blimp_browser_main_parts.cc

 // Copyright 2015 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/app/blimp_browser_main_parts.h"
 
 #include "base/command_line.h"
 #include "base/threading/thread_restrictions.h"
 #include "blimp/common/proto/blimp_message.pb.h"
 #include "blimp/engine/app/blimp_engine_config.h"
@@ skipping 31 matching lines @@
   settings_manager_.reset(new SettingsManager);
   std::unique_ptr<BlimpBrowserContext> browser_context(
       new BlimpBrowserContext(false, net_log_.get()));
   engine_session_.reset(
       new BlimpEngineSession(std::move(browser_context), net_log_.get(),
                              engine_config_.get(), settings_manager_.get()));
   engine_session_->Initialize();
 }
 
 void BlimpBrowserMainParts::PostMainMessageLoopRun() {
+  engine_session_->Finalize();
   engine_session_.reset();
 }
 
 BlimpBrowserContext* BlimpBrowserMainParts::GetBrowserContext() {
   return engine_session_->browser_context();
 }
 
 SettingsManager* BlimpBrowserMainParts::GetSettingsManager() {
   return settings_manager_.get();
 }
 
 }  // namespace engine
 }  // namespace blimp