Fix auto raw pointer deduction on linux

headless/lib/browser/headless_content_browser_client.cc

Index: headless/lib/browser/headless_content_browser_client.cc
diff --git a/headless/lib/browser/headless_content_browser_client.cc b/headless/lib/browser/headless_content_browser_client.cc
index 101d15c662f0386a2cd05b37a7ebdae88f5f885c..6648ee68f2c872fdb78608083b9709ce50a18044 100644
--- a/headless/lib/browser/headless_content_browser_client.cc
+++ b/headless/lib/browser/headless_content_browser_client.cc
@@ -48,7 +48,7 @@ content::BrowserMainParts* HeadlessContentBrowserClient::CreateBrowserMainParts(
 void HeadlessContentBrowserClient::OverrideWebkitPrefs(
     content::RenderViewHost* render_view_host,
     content::WebPreferences* prefs) {
-  auto browser_context = HeadlessBrowserContextImpl::From(
+  auto* browser_context = HeadlessBrowserContextImpl::From(
       render_view_host->GetProcess()->GetBrowserContext());
   const base::Callback<void(headless::WebPreferences*)>& callback =
       browser_context->options()->override_web_preferences_callback();