Create and integrate a metrics service client into Blimp engine.

blimp/engine/session/blimp_engine_session.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/session/blimp_engine_session.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
@@ skipping 199 matching lines @@
       render_widget_feature_(settings_manager_),
       net_components_(
           new EngineNetworkComponents(net_log,
                                       QuitCurrentMessageLoopClosure())) {
   DCHECK(engine_config_);
   DCHECK(settings_manager_);
   screen_->UpdateDisplayScaleAndSize(kDefaultScaleFactor,
                                      gfx::Size(kDefaultDisplayWidth,
                                                kDefaultDisplayHeight));
   render_widget_feature_.SetDelegate(kDummyTabId, this);
+
+  // Initializes the PrefService and MetricsServiceClient for Blimp.
+  browser_context_->Initialize();
 }
 
 BlimpEngineSession::~BlimpEngineSession() {
+  browser_context_->Finalize();
+
   render_widget_feature_.RemoveDelegate(kDummyTabId);
 
   window_tree_host_->GetInputMethod()->RemoveObserver(this);
 
   // Ensure that all WebContents are torn down first, since teardown will
   // trigger RenderViewDeleted callbacks to their observers.
   web_contents_.reset();
 
   // Safely delete network components on the IO thread.
   content::BrowserThread::DeleteSoon(content::BrowserThread::IO, FROM_HERE,
@@ skipping 400 matching lines @@
 
   aura::Window* parent = window_tree_host_->window();
   aura::Window* content = web_contents_->GetNativeView();
   if (!parent->Contains(content))
     parent->AddChild(content);
   content->Show();
 }
 
 }  // namespace engine
 }  // namespace blimp