Revert "Desktop PWAs: Browser tests wait for registry"

This reverts commit 4f68ef3f.

Reason for revert: Failing bot MAC Asan 64 tests
https://ci.chromium.org/p/chromium/builders/ci/Mac%20ASan%2064%20Tests%20%281%29/65394

Original change's description:
> Desktop PWAs: Browser tests wait for registry
>
> The browser test helper methods in web_app_browsertest_util.cc
> that install PWAs (InstallWebApp, InstallWebAppFromManifest,
> PendingAppManagerInstall) now wait for on_registry_ready().
>
> Bug: 1119807
> Change-Id: I60c16e04b75603a8d0979fd09e9f6746335cd788
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2450133
> Commit-Queue: Eric Willigers <ericwilligers@chromium.org>
> Commit-Queue: Alexey Baskakov <loyso@chromium.org>
> Reviewed-by: Alexey Baskakov <loyso@chromium.org>
> Reviewed-by: Alan Cutter <alancutter@chromium.org>
> Auto-Submit: Eric Willigers <ericwilligers@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#814065}

TBR=dmurph@chromium.org,ericwilligers@chromium.org,alancutter@chromium.org,loyso@chromium.org

Change-Id: I23471abd515c34d6262def80bc83613420f90622
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1119807,1135469
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2450319
Commit-Queue: Nohemi Fernandez <fernandex@chromium.org>
Reviewed-by: Nohemi Fernandez <fernandex@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814143}

chrome/browser/ui/web_applications/test/web_app_browsertest_util.cc

@@ -4,7 +4,6 @@
 
 #include "chrome/browser/ui/web_applications/test/web_app_browsertest_util.h"
 
-#include "base/one_shot_event.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/bind_test_util.h"
@@ -30,7 +29,6 @@
 #include "chrome/browser/web_applications/components/web_app_helpers.h"
 #include "chrome/browser/web_applications/components/web_app_provider_base.h"
 #include "chrome/browser/web_applications/components/web_app_tab_helper_base.h"
-#include "chrome/browser/web_applications/web_app_provider.h"
 #include "chrome/common/web_application_info.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "components/security_interstitials/content/security_interstitial_tab_helper.h"
@@ -44,19 +42,6 @@
 
 namespace web_app {
 
-namespace {
-
-void WaitUntilReady(WebAppProvider* provider) {
-  if (provider->on_registry_ready().is_signaled())
-    return;
-
-  base::RunLoop run_loop;
-  provider->on_registry_ready().Post(FROM_HERE, run_loop.QuitClosure());
-  run_loop.Run();
-}
-
-}  // namespace
-
 AppId InstallWebApp(Profile* profile,
                     std::unique_ptr<WebApplicationInfo> web_app_info) {
   if (web_app_info->title.empty())
@@ -64,9 +49,8 @@ AppId InstallWebApp(Profile* profile,
 
   AppId app_id;
   base::RunLoop run_loop;
-  auto* provider = WebAppProvider::Get(profile);
+  auto* provider = WebAppProviderBase::GetProviderBase(profile);
   DCHECK(provider);
-  WaitUntilReady(provider);
   provider->install_manager().InstallWebAppFromInfo(
       std::move(web_app_info), ForInstallableSite::kYes,
       WebappInstallSource::OMNIBOX_INSTALL_ICON,
@@ -87,9 +71,8 @@ AppId InstallWebAppFromManifest(Browser* browser, const GURL& app_url) {
   AppId app_id;
   base::RunLoop run_loop;
 
-  auto* provider = WebAppProvider::Get(browser->profile());
+  auto* provider = WebAppProviderBase::GetProviderBase(browser->profile());
   DCHECK(provider);
-  WaitUntilReady(provider);
   provider->install_manager().InstallWebAppFromManifestWithFallback(
       browser->tab_strip_model()->GetActiveWebContents(),
       /*force_shortcut_app=*/true, WebappInstallSource::MENU_BROWSER_TAB,
@@ -179,9 +162,8 @@ InstallResultCode PendingAppManagerInstall(
     Profile* profile,
     ExternalInstallOptions install_options) {
   DCHECK(profile);
-  auto* provider = WebAppProvider::Get(profile);
+  auto* provider = WebAppProviderBase::GetProviderBase(profile);
   DCHECK(provider);
-  WaitUntilReady(provider);
   base::RunLoop run_loop;
   InstallResultCode result_code;