Enabling TabManager on testing browser process

chrome/test/base/testing_browser_process.cc

 // Copyright (c) 2012 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 "chrome/test/base/testing_browser_process.h"
 
 #include "base/strings/string_util.h"
 #include "base/time/default_clock.h"
 #include "base/time/default_tick_clock.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_impl.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
+#include "chrome/browser/memory/tab_manager.h"
 #include "chrome/browser/notifications/notification_platform_bridge.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/printing/print_job_manager.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "chrome/common/features.h"
 #include "chrome/test/base/testing_browser_process_platform_part.h"
 #include "components/network_time/network_time_tracker.h"
 #include "components/policy/core/browser/browser_policy_connector.h"
 #include "components/prefs/pref_service.h"
@@ skipping 338 matching lines @@
         local_state_, system_request_context()));
   }
   return network_time_tracker_.get();
 }
 
 gcm::GCMDriver* TestingBrowserProcess::gcm_driver() {
   return nullptr;
 }
 
 memory::TabManager* TestingBrowserProcess::GetTabManager() {
+#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
+  if (!tab_manager_.get())
+    tab_manager_.reset(new memory::TabManager());
+  return tab_manager_.get();
+#else
   return nullptr;
+#endif
 }
 
 shell_integration::DefaultWebClientState
 TestingBrowserProcess::CachedDefaultWebClientState() {
   return shell_integration::UNKNOWN_DEFAULT;
 }
 void TestingBrowserProcess::SetSystemRequestContext(
     net::URLRequestContextGetter* context_getter) {
   system_request_context_ = context_getter;
 }
@@ skipping 58 matching lines @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
 TestingBrowserProcessInitializer::TestingBrowserProcessInitializer() {
   TestingBrowserProcess::CreateInstance();
 }
 
 TestingBrowserProcessInitializer::~TestingBrowserProcessInitializer() {
   TestingBrowserProcess::DeleteInstance();
 }