Make kExposeInternalsForTesting usable (again) for interactive content_shell.

content/shell/browser/layout_test/layout_test_content_browser_client.cc

Index: content/shell/browser/layout_test/layout_test_content_browser_client.cc
diff --git a/content/shell/browser/layout_test/layout_test_content_browser_client.cc b/content/shell/browser/layout_test/layout_test_content_browser_client.cc
index 8626064eae30de429fd894f870fd16076de01457..cc665076be43b5cfb118265950060b726735cda0 100644
--- a/content/shell/browser/layout_test/layout_test_content_browser_client.cc
+++ b/content/shell/browser/layout_test/layout_test_content_browser_client.cc
@@ -98,10 +98,6 @@ void LayoutTestContentBrowserClient::AppendExtraCommandLineSwitches(
     command_line->AppendSwitch(switches::kEnableFontAntialiasing);
   }
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kExposeInternalsForTesting)) {
-    command_line->AppendSwitch(switches::kExposeInternalsForTesting);
-  }
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kStableReleaseMode)) {
     command_line->AppendSwitch(switches::kStableReleaseMode);
   }