diff -r 000000000000 -r 6474c204b198 dom/quota/Client.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/quota/Client.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,132 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_quota_client_h__
+#define mozilla_dom_quota_client_h__
+
+#include "mozilla/dom/quota/QuotaCommon.h"
+
+#include "PersistenceType.h"
+
+class nsIOfflineStorage;
+class nsIRunnable;
+
+#define IDB_DIRECTORY_NAME "idb"
+#define ASMJSCACHE_DIRECTORY_NAME "asmjs"
+
+BEGIN_QUOTA_NAMESPACE
+
+class OriginOrPatternString;
+class UsageInfo;
+
+// An abstract interface for quota manager clients.
+// Each storage API must provide an implementation of this interface in order
+// to participate in centralized quota and storage handling.
+class Client
+{
+public:
+  NS_IMETHOD_(MozExternalRefCountType)
+  AddRef() = 0;
+
+  NS_IMETHOD_(MozExternalRefCountType)
+  Release() = 0;
+
+  enum Type {
+    IDB = 0,
+    //LS,
+    //APPCACHE,
+    ASMJS,
+    TYPE_MAX
+  };
+
+  virtual Type
+  GetType() = 0;
+
+  static nsresult
+  TypeToText(Type aType, nsAString& aText)
+  {
+    switch (aType) {
+      case IDB:
+        aText.AssignLiteral(IDB_DIRECTORY_NAME);
+        break;
+
+      case ASMJS:
+        aText.AssignLiteral(ASMJSCACHE_DIRECTORY_NAME);
+        break;
+
+      case TYPE_MAX:
+      default:
+        NS_NOTREACHED("Bad id value!");
+        return NS_ERROR_UNEXPECTED;
+    }
+
+    return NS_OK;
+  }
+
+  static nsresult
+  TypeFromText(const nsAString& aText, Type& aType)
+  {
+    if (aText.EqualsLiteral(IDB_DIRECTORY_NAME)) {
+      aType = IDB;
+    }
+    else if (aText.EqualsLiteral(ASMJSCACHE_DIRECTORY_NAME)) {
+      aType = ASMJS;
+    }
+    else {
+      return NS_ERROR_FAILURE;
+    }
+
+    return NS_OK;
+  }
+
+  // Methods which are called on the IO thred.
+  virtual nsresult
+  InitOrigin(PersistenceType aPersistenceType,
+             const nsACString& aGroup,
+             const nsACString& aOrigin,
+             UsageInfo* aUsageInfo) = 0;
+
+  virtual nsresult
+  GetUsageForOrigin(PersistenceType aPersistenceType,
+                    const nsACString& aGroup,
+                    const nsACString& aOrigin,
+                    UsageInfo* aUsageInfo) = 0;
+
+  virtual void
+  OnOriginClearCompleted(PersistenceType aPersistenceType,
+                         const OriginOrPatternString& aOriginOrPattern) = 0;
+
+  virtual void
+  ReleaseIOThreadObjects() = 0;
+
+  // Methods which are called on the main thred.
+  virtual bool
+  IsFileServiceUtilized() = 0;
+
+  virtual bool
+  IsTransactionServiceActivated() = 0;
+
+  virtual void
+  WaitForStoragesToComplete(nsTArray<nsIOfflineStorage*>& aStorages,
+                            nsIRunnable* aCallback) = 0;
+
+  virtual void
+  AbortTransactionsForStorage(nsIOfflineStorage* aStorage) = 0;
+
+  virtual bool
+  HasTransactionsForStorage(nsIOfflineStorage* aStorage) = 0;
+
+  virtual void
+  ShutdownTransactionService() = 0;
+
+protected:
+  virtual ~Client()
+  { }
+};
+
+END_QUOTA_NAMESPACE
+
+#endif // mozilla_dom_quota_client_h__