Make kExposeInternalsForTesting usable (again) for interactive content_shell.

content/shell/common/shell_switches.cc

 // Copyright (c) 2012 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/shell/common/shell_switches.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_split.h"
 #include "content/shell/common/layout_test/layout_test_switches.h"
 
 namespace switches {
 
 // Tells Content Shell that it's running as a content_browsertest.
 const char kContentBrowserTest[] = "browser-test";
 
 // Makes Content Shell use the given path for its data directory.
 const char kContentShellDataPath[] = "data-path";
 
 // The directory breakpad should store minidumps in.
 const char kCrashDumpsDir[] = "crash-dumps-dir";
 
+// Exposes the window.internals object to JavaScript for interactive development
+// and debugging of layout tests that rely on it.
+const char kExposeInternalsForTesting[] = "expose-internals-for-testing";
+
 // Enable site isolation (--site-per-process style isolation) for a subset of
 // sites. The argument is a wildcard pattern which will be matched against the
 // site URL to determine which sites to isolate. This can be used to isolate
 // just one top-level domain, or just one scheme. Example usages:
 //     --isolate-sites-for-testing=*.com
 //     --isolate-sites-for-testing=https://*
 const char kIsolateSitesForTesting[] = "isolate-sites-for-testing";
 
 // Registers additional font files on Windows (for fonts outside the usual
 // %WINDIR%\Fonts location). Multiple files can be used by separating them
@@ skipping 14 matching lines @@
   }
   return files;
 }
 
 bool IsRunLayoutTestSwitchPresent() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kRunLayoutTest);
 }
 
 }  // namespace switches