Fix global ProfileObservers shutdown flow.

browser/brave_browser_process_impl.cc

@@ -155,6 +155,15 @@ void BraveBrowserProcessImpl::Init() {
   InitSystemRequestHandlerCallback();
 }
 
+#if !BUILDFLAG(IS_ANDROID)
+void BraveBrowserProcessImpl::StartTearDown() {
+  ad_block_service_.reset();
+  brave_stats_updater_.reset();
+  brave_referrals_service_.reset();
+  BrowserProcessImpl::StartTearDown();
+}
+#endif
+
 brave_component_updater::BraveComponent::Delegate*
 BraveBrowserProcessImpl::brave_component_updater_delegate() {
   if (!brave_component_updater_delegate_)

browser/brave_browser_process_impl.h

@@ -128,6 +128,9 @@ class BraveBrowserProcessImpl : public BraveBrowserProcess,
  private:
   // BrowserProcessImpl overrides:
   void Init() override;
+#if !BUILDFLAG(IS_ANDROID)
+  void StartTearDown() override;
+#endif
 
   void CreateProfileManager();
 

chromium_src/chrome/browser/browser_process_impl.h

@@ -28,7 +28,13 @@
 #include "services/network/public/mojom/network_service.mojom-forward.h"
 
 #define Init virtual Init
+#if !BUILDFLAG(IS_ANDROID)
+#define StartTearDown virtual StartTearDown
+#endif  // !BUILDFLAG(IS_ANDROID)
 #include "src/chrome/browser/browser_process_impl.h"
+#if !BUILDFLAG(IS_ANDROID)
+#undef StartTearDown
+#endif  // !BUILDFLAG(IS_ANDROID)
 #undef Init
 
 #endif  // BRAVE_CHROMIUM_SRC_CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_