--- a/chrome/browser/extensions/component_loader.cc
+++ b/chrome/browser/extensions/component_loader.cc
@@ -421,11 +421,6 @@ void ComponentLoader::AddWebStoreApp() {
   if (!IsNormalSession())
     return;
 #endif
-
-  AddWithNameAndDescription(
-      IDR_WEBSTORE_MANIFEST, base::FilePath(FILE_PATH_LITERAL("web_store")),
-      l10n_util::GetStringUTF8(IDS_WEBSTORE_NAME_STORE),
-      l10n_util::GetStringUTF8(IDS_WEBSTORE_APP_DESCRIPTION));
 }
 
 scoped_refptr<const Extension> ComponentLoader::CreateExtension(
@@ -480,11 +475,6 @@ void ComponentLoader::AddDefaultComponen
     Add(IDR_BOOKMARKS_MANIFEST,
         base::FilePath(FILE_PATH_LITERAL("bookmark_manager")));
   }
-#if BUILDFLAG(ENABLE_PRINTING)
-  // Cloud Print component app. Not required on Chrome OS.
-  Add(IDR_CLOUDPRINT_MANIFEST,
-      base::FilePath(FILE_PATH_LITERAL("cloud_print")));
-#endif  // BUILDFLAG(ENABLE_PRINTING)
 #endif  // defined(OS_CHROMEOS)
 
   if (!skip_session_components) {
@@ -560,13 +550,6 @@ void ComponentLoader::AddDefaultComponen
 
     AddHangoutServicesExtension();
     AddImageLoaderExtension();
-
-    bool install_feedback = enable_background_extensions_during_testing;
-#if defined(GOOGLE_CHROME_BUILD)
-    install_feedback = true;
-#endif  // defined(GOOGLE_CHROME_BUILD)
-    if (install_feedback)
-      Add(IDR_FEEDBACK_MANIFEST, base::FilePath(FILE_PATH_LITERAL("feedback")));
   }
 
 #if defined(OS_CHROMEOS)
--- a/chrome/browser/extensions/external_component_loader.cc
+++ b/chrome/browser/extensions/external_component_loader.cc
@@ -31,9 +31,6 @@ ExternalComponentLoader::~ExternalCompon
 
 void ExternalComponentLoader::StartLoading() {
   auto prefs = std::make_unique<base::DictionaryValue>();
-#if defined(GOOGLE_CHROME_BUILD)
-  AddExternalExtension(extension_misc::kInAppPaymentsSupportAppId, prefs.get());
-#endif  // defined(GOOGLE_CHROME_BUILD)
 
 #if defined(OS_CHROMEOS)
   {
--- a/chrome/browser/extensions/webstore_installer.cc
+++ b/chrome/browser/extensions/webstore_installer.cc
@@ -577,28 +577,6 @@ void WebstoreInstaller::DownloadNextPend
 void WebstoreInstaller::DownloadCrx(
     const std::string& extension_id,
     InstallSource source) {
-  download_url_ = GetWebstoreInstallURL(extension_id, source);
-  MaybeAppendAuthUserParameter(approval_->authuser, &download_url_);
-
-  base::FilePath user_data_dir;
-  PathService::Get(chrome::DIR_USER_DATA, &user_data_dir);
-  base::FilePath download_path = user_data_dir.Append(kWebstoreDownloadFolder);
-
-  base::FilePath download_directory(g_download_directory_for_tests ?
-      *g_download_directory_for_tests : download_path);
-
-#if defined(OS_CHROMEOS)
-  // Do not use drive for extension downloads.
-  if (drive::util::IsUnderDriveMountPoint(download_directory)) {
-    download_directory = DownloadPrefs::FromBrowserContext(
-        profile_)->GetDefaultDownloadDirectoryForProfile();
-  }
-#endif
-
-  base::PostTaskAndReplyWithResult(
-      GetExtensionFileTaskRunner().get(), FROM_HERE,
-      base::BindOnce(&GetDownloadFilePath, download_directory, extension_id),
-      base::BindOnce(&WebstoreInstaller::StartDownload, this, extension_id));
 }
 
 // http://crbug.com/165634
@@ -751,28 +729,6 @@ void WebstoreInstaller::UpdateDownloadPr
 }
 
 void WebstoreInstaller::StartCrxInstaller(const DownloadItem& download) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  DCHECK(!crx_installer_.get());
-
-  // The clock may be backward, e.g. daylight savings time just happenned.
-  if (download.GetEndTime() >= download.GetStartTime()) {
-    UMA_HISTOGRAM_TIMES("Extensions.WebstoreDownload.FileDownload",
-                        download.GetEndTime() - download.GetStartTime());
-  }
-  ExtensionService* service = ExtensionSystem::Get(profile_)->
-      extension_service();
-  CHECK(service);
-
-  const Approval* approval = GetAssociatedApproval(download);
-  DCHECK(approval);
-
-  crx_installer_ = download_crx_util::CreateCrxInstaller(profile_, download);
-
-  crx_installer_->set_expected_id(approval->extension_id);
-  crx_installer_->set_is_gallery_install(true);
-  crx_installer_->set_allow_silent_install(true);
-
-  crx_installer_->InstallCrx(download.GetFullPath());
 }
 
 void WebstoreInstaller::ReportFailure(const std::string& error,
--- a/chrome/browser/extensions/component_extensions_whitelist/whitelist.cc
+++ b/chrome/browser/extensions/component_extensions_whitelist/whitelist.cc
@@ -26,7 +26,6 @@ namespace extensions {
 
 bool IsComponentExtensionWhitelisted(const std::string& extension_id) {
   const char* const kAllowed[] = {
-    extension_misc::kInAppPaymentsSupportAppId,
     extension_misc::kMediaRouterStableExtensionId,
     extension_misc::kPdfExtensionId,
 #if defined(OS_CHROMEOS)