Remove some usages of BrowserThread::UnsafeGetMessageLoopForThread

content/shell/browser/layout_test/layout_test_browser_context.cc

Index: content/shell/browser/layout_test/layout_test_browser_context.cc
diff --git a/content/shell/browser/layout_test/layout_test_browser_context.cc b/content/shell/browser/layout_test/layout_test_browser_context.cc
index d0dc9d007e267f7d4250e35f1c2de8ed3a089705..ff55d44548ad12f6bc083e97e6ac370dccb56dd1 100644
--- a/content/shell/browser/layout_test/layout_test_browser_context.cc
+++ b/content/shell/browser/layout_test/layout_test_browser_context.cc
@@ -96,8 +96,8 @@ LayoutTestBrowserContext::CreateURLRequestContextGetter(
       "layout-test-mojom", make_linked_ptr(new MojomProtocolHandler)));
   return new LayoutTestURLRequestContextGetter(
       ignore_certificate_errors(), GetPath(),
-      BrowserThread::UnsafeGetMessageLoopForThread(BrowserThread::IO),
-      BrowserThread::UnsafeGetMessageLoopForThread(BrowserThread::FILE),
+      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO),
+      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE),
       protocol_handlers, std::move(request_interceptors), net_log());
 }