Unrevert r141537: Add extensions::StateStore and use that instead of

chrome/browser/extensions/extension_service.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/extension_service.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 171 matching lines @@
 const char* ExtensionService::kInstallDirectoryName = "Extensions";
 
 const char* ExtensionService::kLocalAppSettingsDirectoryName =
     "Local App Settings";
 const char* ExtensionService::kLocalExtensionSettingsDirectoryName =
     "Local Extension Settings";
 const char* ExtensionService::kSyncAppSettingsDirectoryName =
     "Sync App Settings";
 const char* ExtensionService::kSyncExtensionSettingsDirectoryName =
     "Sync Extension Settings";
+const char* ExtensionService::kStateStoreName = "Extension State";
 
 void ExtensionService::CheckExternalUninstall(const std::string& id) {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   // Check if the providers know about this extension.
   ProviderCollection::const_iterator i;
   for (i = external_extension_providers_.begin();
        i != external_extension_providers_.end(); ++i) {
     DCHECK(i->get()->IsReady());
     if (i->get()->HasExtension(id))
@@ skipping 2347 matching lines @@
 
   // To coexist with certain unit tests that don't have a work-thread message
   // loop available at ExtensionService shutdown, we lazy-initialize this
   // object so that those cases neither create nor destroy an
   // APIResourceController.
   if (!api_resource_controller_.get()) {
     api_resource_controller_.reset(new extensions::APIResourceController());
   }
   return api_resource_controller_.get();
 }