Remove RuntimeAPIDelegate::GetPreviousVersion.

extensions/browser/api/runtime/runtime_api.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/browser/api/runtime/runtime_api.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/lazy_instance.h"
@@ skipping 303 matching lines @@
 void RuntimeAPI::StorePendingOnInstallInfoToPref(const Extension* extension) {
   ExtensionPrefs* prefs = ExtensionPrefs::Get(browser_context_);
   DCHECK(prefs);
 
   // |pending_on_install_info| currently only contains a version string. Instead
   // of making the pref hold a plain string, we store it as a dictionary value
   // so that we can add more stuff to it in the future if necessary.
   std::unique_ptr<base::DictionaryValue> pending_on_install_info(
       new base::DictionaryValue());
   base::Version previous_version =
-      delegate_->GetPreviousExtensionVersion(extension);
+      ExtensionRegistry::Get(browser_context_)->GetVersion(extension);
   pending_on_install_info->SetString(
       kPrefPreviousVersion,
       previous_version.IsValid() ? previous_version.GetString() : "");
   prefs->UpdateExtensionPref(extension->id(),
                              kPrefPendingOnInstalledEventDispatchInfo,
                              std::move(pending_on_install_info));
 }
 
 void RuntimeAPI::ReloadExtension(const std::string& extension_id) {
   delegate_->ReloadExtension(extension_id);
@@ skipping 447 matching lines @@
   content::ChildProcessSecurityPolicy* policy =
       content::ChildProcessSecurityPolicy::GetInstance();
   policy->GrantReadFileSystem(renderer_id, filesystem_id);
   std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
   dict->SetString("fileSystemId", filesystem_id);
   dict->SetString("baseName", relative_path);
   return RespondNow(OneArgument(std::move(dict)));
 }
 
 }  // namespace extensions