Pass FROM_HERE to ObserverListThreadSafe::Notify to improve profile.

chrome/browser/extensions/api/storage/policy_value_store.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/api/storage/policy_value_store.h"
 
 #include "base/logging.h"
 #include "base/values.h"
 #include "components/policy/core/common/policy_map.h"
 #include "components/policy/core/common/policy_types.h"
@@ skipping 87 matching lines @@
   // IGNORE_QUOTA because these settings aren't writable by the extension, and
   // are configured by the domain administrator.
   ValueStore::WriteOptions options = ValueStore::IGNORE_QUOTA;
   result = delegate_->Set(options, current_policy);
   if (!result->HasError()) {
     changes.insert(
         changes.end(), result->changes().begin(), result->changes().end());
   }
 
   if (!changes.empty()) {
-    observers_->Notify(
-        &SettingsObserver::OnSettingsChanged,
-        extension_id_,
-        settings_namespace::MANAGED,
-        ValueStoreChange::ToJson(changes));
+    observers_->Notify(FROM_HERE, &SettingsObserver::OnSettingsChanged,
+                       extension_id_, settings_namespace::MANAGED,
+                       ValueStoreChange::ToJson(changes));
   }
 }
 
 void PolicyValueStore::DeleteStorage() {
   // This is called from our owner, indicating that storage for this extension
   // should be removed.
   delegate_->Clear();
 }
 
 size_t PolicyValueStore::GetBytesInUse(const std::string& key) {
@@ skipping 49 matching lines @@
   return MakeWriteResult(ReadOnlyError(util::NoKey()));
 }
 
 bool PolicyValueStore::Restore() { return delegate_->Restore(); }
 
 bool PolicyValueStore::RestoreKey(const std::string& key) {
   return delegate_->RestoreKey(key);
 }
 
 }  // namespace extensions