Pass FROM_HERE to ObserverListThreadSafe::Notify to improve profile.

chrome/browser/extensions/activity_log/activity_log.cc

 // Copyright (c) 2011 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/activity_log/activity_log.h"
 
 #include <set>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 527 matching lines @@
         dom_verb == DomActionType::METHOD) {
       other->SetInteger(constants::kActionDomVerb, DomActionType::XHR);
     }
   }
 
   if (uma_policy_)
     uma_policy_->ProcessAction(action);
   if (IsDatabaseEnabled() && database_policy_)
     database_policy_->ProcessAction(action);
   if (IsWatchdogAppActive())
-    observers_->Notify(&Observer::OnExtensionActivity, action);
+    observers_->Notify(FROM_HERE, &Observer::OnExtensionActivity, action);
   if (testing_mode_)
     VLOG(1) << action->PrintForDebug();
 }
 
 void ActivityLog::OnScriptsExecuted(
     const content::WebContents* web_contents,
     const ExecutingScriptsMap& extension_ids,
     const GURL& on_url) {
   Profile* profile =
       Profile::FromBrowserContext(web_contents->GetBrowserContext());
@@ skipping 115 matching lines @@
   database_policy_->DeleteDatabase();
 }
 
 template <>
 void BrowserContextKeyedAPIFactory<ActivityLog>::DeclareFactoryDependencies() {
   DependsOn(ExtensionsBrowserClient::Get()->GetExtensionSystemFactory());
   DependsOn(ExtensionRegistryFactory::GetInstance());
 }
 
 }  // namespace extensions