Remove the experimental navigator.storageQuota API

third_party/WebKit/Source/modules/quota/NavigatorStorageQuota.idl

Index: third_party/WebKit/Source/modules/quota/NavigatorStorageQuota.idl
diff --git a/third_party/WebKit/Source/modules/quota/NavigatorStorageQuota.idl b/third_party/WebKit/Source/modules/quota/NavigatorStorageQuota.idl
index 26483d308deb6d0130e9c46d30a74e03d817a99a..09925e138497a525825cbb9ee1f3df3db689c0c1 100644
--- a/third_party/WebKit/Source/modules/quota/NavigatorStorageQuota.idl
+++ b/third_party/WebKit/Source/modules/quota/NavigatorStorageQuota.idl
@@ -17,16 +17,13 @@
  * Boston, MA 02110-1301, USA.
  */
 
-// This partial interface is a merge of three different partial interfaces
+// This partial interface is a merge of two different partial interfaces
 // related to storage.
 partial interface Navigator {
     // http://www.w3.org/TR/2012/WD-quota-api-20120703/#idl-def-StorageQuotaEnvironment
     [MeasureAs=PrefixedStorageQuota] readonly attribute DeprecatedStorageQuota webkitTemporaryStorage;
     [MeasureAs=PrefixedStorageQuota] readonly attribute DeprecatedStorageQuota webkitPersistentStorage;
 
-    // http://www.w3.org/TR/2015/WD-quota-api-20150409/#accessing-storagequota-interface
-    [RuntimeEnabled=QuotaPromise] readonly attribute StorageQuota storageQuota;
-
     // https://storage.spec.whatwg.org/#api
     [RuntimeEnabled=DurableStorage] readonly attribute StorageManager storage;
 };