AppCaches which belong to hosted apps are not protected from deletion

chrome/browser/profiles/profile_impl.cc

Index: chrome/browser/profiles/profile_impl.cc
diff --git a/chrome/browser/profiles/profile_impl.cc b/chrome/browser/profiles/profile_impl.cc
index 619ff135c7e3f9db05e51ec4498cf5c896e395bf..678fbfa68cbe7a9e766331f5f58df2b0955b285f 100644
--- a/chrome/browser/profiles/profile_impl.cc
+++ b/chrome/browser/profiles/profile_impl.cc
@@ -14,6 +14,7 @@
 #include "base/path_service.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
+#include "base/synchronization/waitable_event.h"
 #include "chrome/browser/autocomplete/autocomplete_classifier.h"
 #include "chrome/browser/autofill/personal_data_manager.h"
 #include "chrome/browser/background/background_contents_service_factory.h"
@@ -1337,8 +1338,7 @@ void ProfileImpl::CreateQuotaManagerAndClients() {
           IsOffTheRecord()
               ? FilePath() : GetPath().Append(chrome::kAppCacheDirname),
           &GetResourceContext(),
-          make_scoped_refptr(GetExtensionSpecialStoragePolicy()),
-          clear_local_state_on_exit_));
+          make_scoped_refptr(GetExtensionSpecialStoragePolicy())));
 }
 
 WebKitContext* ProfileImpl::GetWebKitContext() {
@@ -1393,10 +1393,6 @@ void ProfileImpl::Observe(int type,
           webkit_context_->set_clear_local_state_on_exit(
               clear_local_state_on_exit_);
         }
-        if (appcache_service_) {
-          appcache_service_->SetClearLocalStateOnExit(
-              clear_local_state_on_exit_);
-        }
         if (db_tracker_) {
           db_tracker_->SetClearLocalStateOnExit(
               clear_local_state_on_exit_);
@@ -1659,3 +1655,9 @@ prerender::PrerenderManager* ProfileImpl::GetPrerenderManager() {
   }
   return prerender_manager_.get();
 }
+
+base::WaitableEvent* ProfileImpl::ClearAppCache() {
+  if (appcache_service_ && prefs_->GetBoolean(prefs::kClearSiteDataOnExit))
+    return appcache_service_->ClearAppCache(NULL);
+  return NULL;
+}