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

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 129eec39697e1f16b4ad78d800d59234ddfadc59..bf37dfad6c913abef543c496f876bdb79f16bf0a 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -243,8 +243,8 @@
 #include "chrome/browser/local_discovery/storage/privet_filesystem_backend.h"
 #endif
 
-using blink::WebWindowFeatures;
 using base::FileDescriptor;

[Andrew T Wilson (Slow), 2014/05/23 15:20:55]

Ah, the tyranny of alphabetical order.

+using blink::WebWindowFeatures;
 using content::AccessTokenStore;
 using content::BrowserChildProcessHostIterator;
 using content::BrowserThread;
@@ -657,6 +657,9 @@ void ChromeContentBrowserClient::RegisterProfilePrefs(
       prefs::kEnableHyperlinkAuditing,
       true,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterListPref(
+      prefs::kWebKitEnableDeprecatedFeatures,
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 // static
@@ -2381,6 +2384,23 @@ void ChromeContentBrowserClient::OverrideWebkitPrefs(
           extension, view_type, web_prefs);
     }
   }
+
+  // Set list of deprecated features to enable.
+  web_prefs->deprecated_features_to_enable.clear();
+  web_prefs->deprecated_features_to_enable.resize(
+      webkit_glue::DEPRECATED_FEATURE_COUNT, false);
+  const base::ListValue* deprecated_features_list =
+      prefs->GetList(prefs::kWebKitEnableDeprecatedFeatures);
+  for (base::ListValue::const_iterator feature(
+           deprecated_features_list->begin());
+       feature != deprecated_features_list->end();
+       ++feature) {
+    int value = -1;
+    if ((*feature)->GetAsInteger(&value) && value >= 0 &&
+        value < webkit_glue::DEPRECATED_FEATURE_COUNT) {
+      web_prefs->deprecated_features_to_enable[value] = true;
+    }
+  }
 }
 
 void ChromeContentBrowserClient::UpdateInspectorSetting(