Expose Durable Storage API to script

Source/modules/modules.gypi

 {
   'includes': [
     '../core/core_generated.gypi',
     'modules_generated.gypi',
   ],
   'variables': {
     # Experimental hooks for embedder to provide extra IDL and source files.
     #
     # Note: this is not a supported API. If you rely on this, you will be broken
     # from time to time as the code generator changes in backward incompatible
@@ skipping 146 matching lines @@
       'presentation/PresentationRequest.idl',
       'presentation/PresentationSession.idl',
       'push_messaging/PushEvent.idl',
       'push_messaging/PushManager.idl',
       'push_messaging/PushMessageData.idl',
       'push_messaging/PushSubscription.idl',
       'quota/DeprecatedStorageInfo.idl',
       'quota/DeprecatedStorageQuota.idl',
       'quota/StorageErrorCallback.idl',
       'quota/StorageInfo.idl',
+      'quota/StorageManager.idl',
       'quota/StorageQuota.idl',
       'quota/StorageQuotaCallback.idl',
       'quota/StorageUsageCallback.idl',
       'screen_orientation/ScreenOrientation.idl',
       'serviceworkers/Client.idl',
       'serviceworkers/Clients.idl',
       'serviceworkers/ExtendableEvent.idl',
       'serviceworkers/FetchEvent.idl',
       'serviceworkers/ServiceWorker.idl',
       'serviceworkers/ServiceWorkerContainer.idl',
@@ skipping 1063 matching lines @@
       'quota/DeprecatedStorageQuota.cpp',
       'quota/DeprecatedStorageQuota.h',
       'quota/DeprecatedStorageQuotaCallbacksImpl.cpp',
       'quota/DeprecatedStorageQuotaCallbacksImpl.h',
       'quota/NavigatorStorageQuota.cpp',
       'quota/NavigatorStorageQuota.h',
       'quota/StorageErrorCallback.cpp',
       'quota/StorageErrorCallback.h',
       'quota/StorageInfo.cpp',
       'quota/StorageInfo.h',
+      'quota/StorageManager.cpp',
+      'quota/StorageManager.h',
       'quota/StorageQuota.cpp',
       'quota/StorageQuota.h',
       'quota/StorageQuotaCallback.h',
       'quota/StorageQuotaCallbacksImpl.cpp',
       'quota/StorageQuotaCallbacksImpl.h',
       'quota/StorageQuotaClient.cpp',
       'quota/StorageQuotaClient.h',
       'quota/StorageUsageCallback.h',
       'quota/WorkerNavigatorStorageQuota.cpp',
       'quota/WorkerNavigatorStorageQuota.h',
@@ skipping 484 matching lines @@
       'webaudio/AudioBasicProcessorHandlerTest.cpp',
       'webaudio/ConvolverNodeTest.cpp',
       'webaudio/DynamicsCompressorNodeTest.cpp',
       'webaudio/ScriptProcessorNodeTest.cpp',
       'webaudio/StereoPannerNodeTest.cpp',
       'websockets/DOMWebSocketTest.cpp',
       'websockets/DocumentWebSocketChannelTest.cpp',
     ],
   },
 }