Replace ProfileManagerObserver with callback

chrome/browser/profiles/profile.h

Index: chrome/browser/profiles/profile.h
diff --git a/chrome/browser/profiles/profile.h b/chrome/browser/profiles/profile.h
index 8a2f4aec927bf4b6e2e17490814ab2c17786d52d..fcda108de69001997d30339c5793fe0a8495b651 100644
--- a/chrome/browser/profiles/profile.h
+++ b/chrome/browser/profiles/profile.h
@@ -112,6 +112,15 @@ class Profile : public content::BrowserContext {
     IMPLICIT_ACCESS
   };
 
+  enum CreateStatus {
+    // Profile services were not created.
+    CREATE_STATUS_FAIL,
+    // Profile created but before initializing extensions and promo resources.
+    CREATE_STATUS_CREATED,
+    // Profile is created, extensions and promo resources are initialized.
+    CREATE_STATUS_INITIALIZED,
+  };
+
   class Delegate {
    public:
     // Called when creation of the profile is finished.