extensions: Abstract out install delay strategy

chrome/browser/extensions/extension_system_impl.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 "chrome/browser/extensions/extension_system_impl.h"
 
 #include <algorithm>
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string_tokenizer.h"
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/chrome_app_sorting.h"
 #include "chrome/browser/extensions/chrome_content_verifier_delegate.h"
 #include "chrome/browser/extensions/component_loader.h"
 #include "chrome/browser/extensions/extension_error_reporter.h"
+#include "chrome/browser/extensions/extension_garbage_collector.h"
 #include "chrome/browser/extensions/extension_management.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_sync_service.h"
 #include "chrome/browser/extensions/extension_system_factory.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/extensions/install_verifier.h"
 #include "chrome/browser/extensions/navigation_observer.h"
 #include "chrome/browser/extensions/shared_module_service.h"
 #include "chrome/browser/extensions/shared_user_script_master.h"
 #include "chrome/browser/extensions/state_store_notification_observer.h"
 #include "chrome/browser/extensions/unpacked_installer.h"
+#include "chrome/browser/extensions/update_install_gate.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/webui/extensions/extension_icon_source.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/features/feature_channel.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/url_data_source.h"
 #include "extensions/browser/content_verifier.h"
 #include "extensions/browser/extension_pref_store.h"
 #include "extensions/browser/extension_pref_value_map.h"
@@ skipping 91 matching lines @@
 #if defined(OS_CHROMEOS)
   if (device_local_account_management_policy_provider_) {
     management_policy_->RegisterProvider(
         device_local_account_management_policy_provider_.get());
   }
 #endif  // defined(OS_CHROMEOS)
 
   management_policy_->RegisterProvider(InstallVerifier::Get(profile_));
 }
 
+void ExtensionSystemImpl::Shared::InitInstallGates() {
+  update_install_gate_.reset(new UpdateInstallGate(extension_service_.get()));
+  extension_service_->RegisterInstallGate(
+      ExtensionPrefs::DELAY_REASON_WAIT_FOR_IDLE, update_install_gate_.get());
+  extension_service_->RegisterInstallGate(
+      ExtensionPrefs::DELAY_REASON_GC,
+      ExtensionGarbageCollector::Get(profile_));
+  extension_service_->RegisterInstallGate(
+      ExtensionPrefs::DELAY_REASON_WAIT_FOR_IMPORTS,
+      extension_service_->shared_module_service());
+}
+
 void ExtensionSystemImpl::Shared::Init(bool extensions_enabled) {
   TRACE_EVENT0("browser,startup", "ExtensionSystemImpl::Shared::Init");
   const base::CommandLine* command_line =
       base::CommandLine::ForCurrentProcess();
 
   navigation_observer_.reset(new NavigationObserver(profile_));
 
   bool allow_noisy_errors = !command_line->HasSwitch(switches::kNoErrorDialogs);
   ExtensionErrorReporter::Init(allow_noisy_errors);
 
@@ skipping 65 matching lines @@
       // Blocking the UI thread is acceptable here since
       // this flag designated for developers.
       base::ThreadRestrictions::ScopedAllowIO allow_io;
       extension_service_->component_loader()->AddOrReplace(
           base::FilePath(t.token()));
     }
   }
 
   app_sorting_.reset(new ChromeAppSorting(profile_));
 
+  InitInstallGates();
+
   extension_service_->Init();
 
   // Make sure ExtensionSyncService is created.
   ExtensionSyncService::Get(profile_);
 
   // Make the chrome://extension-icon/ resource available.
   content::URLDataSource::Add(profile_, new ExtensionIconSource(profile_));
 
   quota_service_.reset(new QuotaService);
 
@@ skipping 200 matching lines @@
 void ExtensionSystemImpl::UnregisterExtensionWithRequestContexts(
     const std::string& extension_id,
     const UnloadedExtensionInfo::Reason reason) {
   BrowserThread::PostTask(
       BrowserThread::IO,
       FROM_HERE,
       base::Bind(&InfoMap::RemoveExtension, info_map(), extension_id, reason));
 }
 
 }  // namespace extensions