Restore thread check in KeyedService factories.

components/keyed_service/content/browser_context_keyed_base_factory.cc

 // Copyright 2014 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 "components/keyed_service/content/browser_context_keyed_base_factory.h"
 
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "content/public/browser/browser_context.h"
 
 BrowserContextKeyedBaseFactory::BrowserContextKeyedBaseFactory(
     const char* name,
     BrowserContextDependencyManager* manager)
     : KeyedServiceBaseFactory(name, manager) {
 }
 
 BrowserContextKeyedBaseFactory::~BrowserContextKeyedBaseFactory() {
 }
 
 content::BrowserContext* BrowserContextKeyedBaseFactory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
-  // TODO(crbug.com/701326): This DCHECK should be moved to GetContextToUse().
-  DCHECK(CalledOnValidThread());
-
   // Safe default for the Incognito mode: no service.
   if (context->IsOffTheRecord())
     return NULL;
 
   return context;
 }
 
 void BrowserContextKeyedBaseFactory::RegisterUserPrefsOnBrowserContextForTest(
     content::BrowserContext* context) {
   KeyedServiceBaseFactory::RegisterUserPrefsOnContextForTest(context);
 }
 
 bool BrowserContextKeyedBaseFactory::ServiceIsCreatedWithBrowserContext()
     const {
   return KeyedServiceBaseFactory::ServiceIsCreatedWithContext();
 }
 
 bool BrowserContextKeyedBaseFactory::ServiceIsNULLWhileTesting() const {
   return KeyedServiceBaseFactory::ServiceIsNULLWhileTesting();
 }
 
 void BrowserContextKeyedBaseFactory::BrowserContextDestroyed(
     content::BrowserContext* context) {
   KeyedServiceBaseFactory::ContextDestroyed(context);
 }
 
 base::SupportsUserData* BrowserContextKeyedBaseFactory::GetContextToUse(
     base::SupportsUserData* context) const {
+  DCHECK(CalledOnValidThread());
   AssertContextWasntDestroyed(context);
   return GetBrowserContextToUse(static_cast<content::BrowserContext*>(context));
 }
 
 bool BrowserContextKeyedBaseFactory::ServiceIsCreatedWithContext() const {
   return ServiceIsCreatedWithBrowserContext();
 }
 
 void BrowserContextKeyedBaseFactory::ContextShutdown(
     base::SupportsUserData* context) {
@@ skipping 17 matching lines @@
 
 bool BrowserContextKeyedBaseFactory::HasTestingFactory(
     base::SupportsUserData* context) {
   return HasTestingFactory(static_cast<content::BrowserContext*>(context));
 }
 
 void BrowserContextKeyedBaseFactory::CreateServiceNow(
     base::SupportsUserData* context) {
   CreateServiceNow(static_cast<content::BrowserContext*>(context));
 }