WIP: Towards merging OffscreenCanvas and Mus code

extensions/browser/extensions_test.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 "extensions/browser/extensions_test.h"
 
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/common/content_client.h"
 #include "content/public/test/test_browser_context.h"
@@ skipping 24 matching lines @@
 ExtensionsTest::~ExtensionsTest() {
   ExtensionsBrowserClient::Set(nullptr);
   content::SetBrowserClientForTesting(nullptr);
   content::SetUtilityClientForTesting(nullptr);
 }
 
 void ExtensionsTest::SetUp() {
   // Crashing here? Don't use this class in Chrome's unit_tests. See header.
   BrowserContextDependencyManager::GetInstance()
       ->CreateBrowserContextServicesForTest(browser_context_.get());
+
+  rvh_test_enabler_ = base::MakeUnique<content::RenderViewHostTestEnabler>();
 }
 
 void ExtensionsTest::TearDown() {
   // Allows individual tests to have BrowserContextKeyedServiceFactory objects
   // as member variables instead of singletons. The individual services will be
   // cleaned up before the factories are destroyed.
   BrowserContextDependencyManager::GetInstance()->DestroyBrowserContextServices(
       browser_context_.get());
   extensions_browser_client_.reset();
   browser_context_.reset();
 }
 
 }  // namespace extensions