Move PROFILE_DESTROYED notification to ProfileDestroyer and observe it in ExtensionProcessManager.

chrome/test/base/testing_profile.cc

Index: chrome/test/base/testing_profile.cc
diff --git a/chrome/test/base/testing_profile.cc b/chrome/test/base/testing_profile.cc
index f881ccefa2c2f2fa604b559cc9845a50778eccce..388b4528ab31d4f954d8334d1a59be1f88de0860 100644
--- a/chrome/test/base/testing_profile.cc
+++ b/chrome/test/base/testing_profile.cc
@@ -248,11 +248,7 @@ void TestingProfile::FinishInit() {
 }
 
 TestingProfile::~TestingProfile() {
-  DCHECK(content::NotificationService::current());
-  content::NotificationService::current()->Notify(
-      chrome::NOTIFICATION_PROFILE_DESTROYED,
-      content::Source<Profile>(static_cast<Profile*>(this)),
-      content::NotificationService::NoDetails());
+  MaybeSendDestroyedNotification();
 
   profile_dependency_manager_->DestroyProfileServices(this);