Remove showModalDialog (Chrome side)

chrome/browser/policy/configuration_policy_handler_list_factory.cc

 // Copyright 2013 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/policy/configuration_policy_handler_list_factory.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/memory/scoped_vector.h"
 #include "base/values.h"
@@ skipping 498 matching lines @@
             new base::FundamentalValue(entry.manifest_type))));
   }
 }
 #endif
 
 #if !defined(OS_IOS)
 void GetDeprecatedFeaturesMap(
     ScopedVector<StringMappingListPolicyHandler::MappingEntry>* result) {
   // Maps feature tags as specified in policy to the corresponding switch to
   // re-enable them.
-  // TODO(atwilson): Remove after 2015-04-30 per http://crbug.com/374782.
-  result->push_back(new StringMappingListPolicyHandler::MappingEntry(
-      "ShowModalDialog_EffectiveUntil20150430",
-      scoped_ptr<base::Value>(new base::StringValue(
-          switches::kEnableShowModalDialog))));
 }
 #endif  // !defined(OS_IOS)
 
 }  // namespace
 
 void PopulatePolicyHandlerParameters(PolicyHandlerParameters* parameters) {
 #if defined(OS_CHROMEOS)
   if (user_manager::UserManager::IsInitialized()) {
     const user_manager::User* user =
         user_manager::UserManager::Get()->GetActiveUser();
@@ skipping 262 matching lines @@
           chrome_schema,
           SCHEMA_STRICT,
           SimpleSchemaValidatingPolicyHandler::RECOMMENDED_ALLOWED,
           SimpleSchemaValidatingPolicyHandler::MANDATORY_PROHIBITED)));
 #endif  // defined(OS_CHROMEOS)
 
   return handlers.Pass();
 }
 
 }  // namespace policy