Allow startup with missing V8 snapshot file.

content/test/test_blink_web_unit_test_support.cc

 // Copyright 2013 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 "content/test/test_blink_web_unit_test_support.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/path_service.h"
@@ skipping 72 matching lines @@
 TestBlinkWebUnitTestSupport::TestBlinkWebUnitTestSupport() {
 #if defined(OS_MACOSX)
   base::mac::ScopedNSAutoreleasePool autorelease_pool;
 #endif
 
   url_loader_factory_.reset(new WebURLLoaderMockFactory());
   mock_clipboard_.reset(new MockWebClipboardImpl());
 
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
   gin::V8Initializer::LoadV8Snapshot();
+  gin::V8Initializer::LoadV8Natives();
 #endif
 
   scoped_refptr<base::SingleThreadTaskRunner> dummy_task_runner;
   scoped_ptr<base::ThreadTaskRunnerHandle> dummy_task_runner_handle;
   if (base::MessageLoopProxy::current()) {
     renderer_scheduler_ = scheduler::RendererScheduler::Create();
     web_thread_.reset(new scheduler::WebThreadImplForRendererScheduler(
         renderer_scheduler_.get()));
   } else {
     // Dummy task runner is initialized here because the blink::initialize
@@ skipping 270 matching lines @@
   DCHECK(base::MessageLoop::current());
   DCHECK(!base::MessageLoop::current()->is_running());
   base::MessageLoop::current()->Run();
 }
 
 void TestBlinkWebUnitTestSupport::exitRunLoop() {
   base::MessageLoop::current()->Quit();
 }
 
 }  // namespace content