Remove BrowserThread dependency from usb_service.

extensions/shell/browser/shell_browser_main_parts.cc

 // Copyright 2014 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 "extensions/shell/browser/shell_browser_main_parts.h"
 
 #include "base/command_line.h"
 #include "base/run_loop.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/omaha_query_params/omaha_query_params.h"
 #include "content/public/browser/context_factory.h"
 #include "content/public/common/result_codes.h"
 #include "content/shell/browser/shell_devtools_delegate.h"
 #include "content/shell/browser/shell_net_log.h"
 #include "extensions/browser/browser_context_keyed_service_factories.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/shell/browser/shell_browser_context.h"
 #include "extensions/shell/browser/shell_browser_main_delegate.h"
 #include "extensions/shell/browser/shell_desktop_controller.h"
+#include "extensions/shell/browser/shell_device_client.h"
 #include "extensions/shell/browser/shell_extension_system.h"
 #include "extensions/shell/browser/shell_extension_system_factory.h"
 #include "extensions/shell/browser/shell_extensions_browser_client.h"
 #include "extensions/shell/browser/shell_omaha_query_params_delegate.h"
 #include "extensions/shell/common/shell_extensions_client.h"
 #include "extensions/shell/common/switches.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/ime/input_method_initializer.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 68 matching lines @@
   browser_context_.reset(new ShellBrowserContext);
 
   aura::Env::GetInstance()->set_context_factory(content::GetContextFactory());
 
   desktop_controller_.reset(browser_main_delegate_->CreateDesktopController());
 
   // NOTE: Much of this is culled from chrome/test/base/chrome_test_suite.cc
   // TODO(jamescook): Initialize user_manager::UserManager.
   net_log_.reset(new content::ShellNetLog("app_shell"));
 
+  device_client_.reset(new ShellDeviceClient);
+
   extensions_client_.reset(new ShellExtensionsClient());
   ExtensionsClient::Set(extensions_client_.get());
 
   extensions_browser_client_.reset(
       new ShellExtensionsBrowserClient(browser_context_.get()));
   ExtensionsBrowserClient::Set(extensions_browser_client_.get());
 
   omaha_query_params_delegate_.reset(new ShellOmahaQueryParamsDelegate);
   omaha_query_params::OmahaQueryParams::SetDelegate(
       omaha_query_params_delegate_.get());
@@ skipping 60 matching lines @@
 }
 
 void ShellBrowserMainParts::CreateExtensionSystem() {
   DCHECK(browser_context_);
   extension_system_ = static_cast<ShellExtensionSystem*>(
       ExtensionSystem::Get(browser_context_.get()));
   extension_system_->InitForRegularProfile(true);
 }
 
 }  // namespace extensions