Unload all apps / extensions when deleting a profile.

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index 0643a188ac11213941f6b0d9d1ae70df6d97c1d9..f3e71c14e86fa01188a4773b7221924a4a69593f 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -445,6 +445,11 @@ Browser::Browser(const CreateParams& params)
 }
 
 Browser::~Browser() {
+  // Stop observing notifications before continuing with destruction. Profile
+  // destruction will unload extensions and reentrant calls to Browser:: should
+  // be avoided while it is being torn down.
+  registrar_.RemoveAll();
+
   // The tab strip should not have any tabs at this point.
   DCHECK(tab_strip_model_->empty());
   tab_strip_model_->RemoveObserver(this);