Remove notification from PromoResourceService

This CL removes the notification and replaces it by a callback
list.
The underlying goal is to move PromoResourceService to
components/web_resource, and use it on iOS.

BUG=452912

Review URL: https://codereview.chromium.org/926633002

Cr-Commit-Position: refs/heads/master@{#319242}

1 files changed, 5 insertions, 0 deletions

diff --git a/chrome/browser/browser_process_impl.cc b/chrome/browser/browser_process_impl.cc
index 2f86717..31a2dbc 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -570,6 +570,11 @@ chrome_variations::VariationsService* BrowserProcessImpl::variations_service() {
   return GetMetricsServicesManager()->GetVariationsService();
 }
 
+PromoResourceService* BrowserProcessImpl::promo_resource_service() {
+  DCHECK(CalledOnValidThread());
+  return promo_resource_service_.get();
+}
+
 BrowserProcessPlatformPart* BrowserProcessImpl::platform_part() {
   return platform_part_.get();
 }