Add --expose-internals-for-testing flag

content/public/common/content_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/public/common/content_switches.h"
 
 namespace switches {
 
 // By default, file:// URIs cannot read other file:// URIs. This is an
 // override for developers who need the old behavior for testing.
@@ skipping 450 matching lines @@
 // pinch gestures.
 const char kEnableViewport[]                = "enable-viewport";
 
 // Enables experimental features for the geolocation API.
 // Current features:
 // - CoreLocation support for Mac OS X 10.6
 // - Gateway location for Linux and Windows
 // - Location platform support for Windows 7
 const char kExperimentalLocationFeatures[]  = "experimental-location-features";
 
+// Exposes the window.internals object to JavaScript for interactive development
+// and debugging of layout tests that rely on it.  For testing only, since
+// (like other testing flags) it has security implications.
+const char kExposeInternalsForTesting[]     = "expose-internals-for-testing";
+
 // If accelerated compositing is supported, always enter compositing mode for
 // the base layer even when compositing is not strictly required.
 const char kForceCompositingMode[]          = "force-compositing-mode";
 
 // This flag disables force compositing mode and prevents it from being enabled
 // via field trials.
 const char kDisableForceCompositingMode[]   = "disable-force-compositing-mode";
 
 // Some field trials may be randomized in the browser, and the randomly selected
 // outcome needs to be propagated to the renderer. For instance, this is used
@@ skipping 379 matching lines @@
 const char kOverscrollHistoryNavigation[] =
     "overscroll-history-navigation";
 
 // Forward overscroll event data from the renderer to the browser.
 const char kEnableOverscrollNotifications[] = "enable-overscroll-notifications";
 
 // Enables WebGL extensions not yet approved by the community.
 const char kEnableWebGLDraftExtensions[] = "enable-webgl-draft-extensions";
 
 }  // namespace switches