Move impl of identity.GetAccounts() extension API to its own file

chrome/browser/extensions/api/identity/identity_api.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/extensions/api/identity/identity_api.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <set>
@@ skipping 206 matching lines @@
                                          bool is_signed_in) {
   account_tracker_.SetAccountStateForTest(ids, is_signed_in);
 }
 
 template <>
 void BrowserContextKeyedAPIFactory<IdentityAPI>::DeclareFactoryDependencies() {
   DependsOn(ExtensionsBrowserClient::Get()->GetExtensionSystemFactory());
   DependsOn(ProfileOAuth2TokenServiceFactory::GetInstance());
 }
 
-IdentityGetAccountsFunction::IdentityGetAccountsFunction() {
-}
-
-IdentityGetAccountsFunction::~IdentityGetAccountsFunction() {
-}
-
-ExtensionFunction::ResponseAction IdentityGetAccountsFunction::Run() {
-  if (GetProfile()->IsOffTheRecord()) {
-    return RespondNow(Error(identity_constants::kOffTheRecord));
-  }
-
-  std::vector<std::string> gaia_ids =
-      IdentityAPI::GetFactoryInstance()->Get(GetProfile())->GetAccounts();
-  DCHECK(gaia_ids.size() < 2 || switches::IsExtensionsMultiAccount());
-
-  std::unique_ptr<base::ListValue> infos(new base::ListValue());
-
-  for (std::vector<std::string>::const_iterator it = gaia_ids.begin();
-       it != gaia_ids.end();
-       ++it) {
-    api::identity::AccountInfo account_info;
-    account_info.id = *it;
-    infos->Append(account_info.ToValue());
-  }
-
-  return RespondNow(OneArgument(std::move(infos)));
-}
-
 }  // namespace extensions