Add separate flag for IndexedDatabase in workers since the current implementation...

Add separate flag for IndexedDatabase in workers since the current implementation is not threadsafe
https://bugs.webkit.org/show_bug.cgi?id=131785
rdar://problem/16003108

Reviewed by Brady Eidson.

Source/JavaScriptCore:

* Configurations/FeatureDefines.xcconfig: Added INDEXED_DATABASE_IN_WORKERS.

Source/WebCore:

* Configurations/FeatureDefines.xcconfig: Added INDEXED_DATABASE_IN_WORKERS.

* Modules/indexeddb/WorkerGlobalScopeIndexedDatabase.cpp: Use the new conditional
instead of the old one.
* Modules/indexeddb/WorkerGlobalScopeIndexedDatabase.h: Ditto.
* Modules/indexeddb/WorkerGlobalScopeIndexedDatabase.idl: Ditto.

Source/WebKit/mac:

* Configurations/FeatureDefines.xcconfig: Added INDEXED_DATABASE_IN_WORKERS.

Source/WebKit2:

* Configurations/FeatureDefines.xcconfig: Added INDEXED_DATABASE_IN_WORKERS.

Source/WTF:

* wtf/FeatureDefines.h: Added INDEXED_DATABASE_IN_WORKERS.

LayoutTests:

* js/dom/global-constructors-attributes-dedicated-worker-expected.txt:
* js/dom/global-constructors-attributes-shared-worker-expected.txt:
Updated results since indexed database features are not on by default any more.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@167427 268f45cc-cd09-0410-ab3c-d52691b4dbfc