Add a policy to re-enable deprecated web platform features.

chrome/common/pref_names.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 "chrome/common/pref_names.h"
 
 #include "base/basictypes.h"
 #include "chrome/common/pref_font_webkit_names.h"
 
 namespace prefs {
@@ skipping 137 matching lines @@
 
 // The value to use for Accept-Languages HTTP header when making an HTTP
 // request.
 const char kAcceptLanguages[] = "intl.accept_languages";
 
 // The value to use for showing locale-dependent encoding list for different
 // locale, it's initialized from the corresponding string resource that is
 // stored in non-translatable part of the resource bundle.
 const char kStaticEncodings[] = "intl.static_encodings";
 
+// A list of deprecated web platform features to be enabled in the renderer.
+// Valid list entries are RendererPreferencesDeprecatedFeatureEnum integer
+// values.
+const char kEnableDeprecatedWebPlatformFeatures[] =
+    "enable_deprecated_web_platform_features";
+
 // If these change, the corresponding enums in the extension API
 // experimental.fontSettings.json must also change.
 const char* const kWebKitScriptsForFontFamilyMaps[] = {
 #define EXPAND_SCRIPT_FONT(x, script_name) script_name ,
 #include "chrome/common/pref_font_script_names-inl.h"
 ALL_FONT_SCRIPTS("unused param")
 #undef EXPAND_SCRIPT_FONT
 };
 
 const size_t kWebKitScriptsForFontFamilyMapsLength =
@@ skipping 2363 matching lines @@
 // "mapped_title" entries, detailing the bookmark target URL (if any), the title
 // given by the PartnerBookmarksProvider and either the user-visible renamed
 // title or an empty string if the bookmark node was removed.
 const char kPartnerBookmarkMappings[] = "partnerbookmarks.mappings";
 #endif
 
 // Whether DNS Quick Check is disabled in proxy resolution.
 const char kQuickCheckEnabled[] = "proxy.quick_check_enabled";
 
 }  // namespace prefs