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 a6db422c454cbdf3c5cb4d062d9dafee2bec41d6..e993fc18df2a04a9a3002d92a841ad4e85440948 100644
--- a/headless/lib/browser/headless_content_browser_client.cc
+++ b/headless/lib/browser/headless_content_browser_client.cc
@@ -119,7 +119,7 @@ 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();