Implemented ForceMaximizeBrowserWindowOnFirstRun policy, added unit test and browser test.

chrome/browser/chromeos/preferences.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/browser/chromeos/preferences.h"
 
 #include <vector>
 
 #include "ash/autoclick/autoclick_controller.h"
 #include "ash/shell.h"
@@ skipping 309 matching lines @@
 
   input_method::InputMethodSyncer::RegisterProfilePrefs(registry);
 
   registry->RegisterBooleanPref(
       prefs::kResolveTimezoneByGeolocation, true,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
 
   registry->RegisterBooleanPref(
       prefs::kCaptivePortalAuthenticationIgnoresProxy, true,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+
+  registry->RegisterBooleanPref(
+      prefs::kForceMaximizeOnFirstRun, false,
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 void Preferences::InitUserPrefs(PrefServiceSyncable* prefs) {
   prefs_ = prefs;
 
   BooleanPrefMember::NamedChangeCallback callback =
       base::Bind(&Preferences::OnPreferenceChanged, base::Unretained(this));
 
   performance_tracing_enabled_.Init(prefs::kPerformanceTracingEnabled,
                                     prefs, callback);
@@ skipping 392 matching lines @@
   touch_hud_projection_enabled_.SetValue(enabled);
 }
 
 void Preferences::ActiveUserChanged(const user_manager::User* active_user) {
   if (active_user != user_)
     return;
   ApplyPreferences(REASON_ACTIVE_USER_CHANGED, "");
 }
 
 }  // namespace chromeos