import changes from `dev' branch of rmottola/Arctic-Fox:

- Don't upgrade gfx features after device resets. (bug 1183910 part 5, r=mattwoodrow) (e53d0f91f)
- Use the same graphics device parameters across processes. (bug 1183910 part 7, r=mattwoodrow) (083ae4f15)
- Rename DriverInitCrashDetection to DriverCrashGuard. (bug 1190281 part 2, r=mattwoodrow) (9bd189d09)
- Make DriverCrashGuard initialization lazy. (bug 1190281 part 3, r=mattwoodrow) (6821dc386)
- Pull D3D11 logic out of DriverCrashGuard. (bug 1190281 part 4, r=mattwoodrow) (e499a0079)
- Move telemetry recording into D3D11LayersCrashGuard. (bug 1190281 part 5, r=mattwoodrow) (b50a4c2b4)
- Factor prefs out of DriverCrashGuard. (bug 1190281 part 6, r=mattwoodrow) (a3a1166ab)
- Bug 1170939 - Close PBontentBridge when receving shut dwon message, r=khuey (5473d07f0)
- Allow DriverCrashGuard to be used in content processes. (bug 1190281 part 7, r=mattwoodrow) (c9eaf8315)
- Add a crash guard for DXVA2D3D9. (bug 1190281 part 8, r=mattwoodrow) (eceff5212)
- Add driver crash guards to WebGL (bug 1190281 part 9, r=jgilbert,mattwoodrow) (c362b60c6)
- Fix bogus assert in DriverCrashGuard. (bug 1190281 followup, r=mattwoodrow) (d4a7145bd)
- Bug 968923 - part 5b - add nsIDOMWindowUtils::forceUseCounterFlush; r=bz (138d30251)
- Bug 968923 - part 5c - add tests for use counters; r=bz (0c4b745e0)
- Bug 554186 - Part 1: Unimplement NPN_Status API. r=josh (8759dad40)
- Bug 554186 - Part 2: Remove unused nsPluginInstanceOwner::ShowNativeContextMenu(). r=josh (ad2ac0c4d)
- Bug 1174913 - anchor and area mochitests. r=bz (ab2c58a34)
- Bug 959992. Go back to not treating properties that the named properties object exposes as enumerable. r=peterv (0adeeb910)
- Bug 1154974 (Part 1) - Give blobs serial numbers. r=bent (4602ca2cd)
- Bug 1154974 (Part 2) - Merge image cache entries for blobs URIs with the same underlying blob. r=baku (3b64b409e)
- Bug 1173314 - Make GetMozFullPath and GetMozFullPathInternal const. r=sicking (f8eaabb1e)
- Bug 1167389 - Make FileList::mParent a smart pointer, and declare it to the cycle collector. r=ehsan (d1217e547)
- Bug 1173390 - Remove the majority of the old directory picker implementation to prepare for the new implementation under bug 1164310. r=baku (750049972)
- Bug 1164310, part 1 - Make the code for bypassing mobile security checks more general so that it can be used on non-mobile. r=baku (0486fb5ff)
- Bug 1164310, part 2 - Implement an abstraction for a rooted filesystem for non-mobile devices. r=baku (f1d906bd6)
- Bug 1164310, part 3 - Allow the DirState of blobs to be set explicitly. r=baku (13d832700)
- Bug 1164310, part 4 - Implement the new HTMLInputElement API including the new Promise returning GetFilesAndDirectories. r=baku (d0f93ec19)
- Bug 1164310, part 5 - Implement new anonymous content and layout pieces for directory picking via input elements. r=tnikkel (ac5a00781)
- Bug 1164310, part 6 - Implement the new Promise returning DataTransfer.getFilesAndDirectories() API. r=baku (375fba953)
- Bug 1164310 - Follow-up: Fix build bustage with --disable-accessibility. r=me (da0e6745b)
- Bug 1164310, part 7 - Touch CLOBBER since bug 1177844 isn't fixed yet. r=me (5fa829742)
- Bug 1185381 - Make FileList clonable - patch 1 - move code into FileList.h/.cpp, r=smaug (b85483178)
- Bug 1185381 - Make FileList clonable - patch 2 - rename FILEIMPL_IID to BLOBIMPL_IID, r=smaug (0f920cd05)
- Bug 1185360 - PostMessageEvent should not have a different behavior if the main principal subsumes the destination one., r=smaug (070ab034b)
- Bug 1185381 - Make FileList clonable - patch 3 - FileListClonedData implementation, r=smaug (f4f082d18)
-  Bug 1185381 - Make FileList clonable - patch 4 - tests, r=smaug (fb3637313)

dom/filesystem/OSFileSystem.cpp

@@ -0,0 +1,80 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=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/. */
+
+#include "mozilla/dom/OSFileSystem.h"
+
+#include "mozilla/dom/Directory.h"
+#include "mozilla/dom/File.h"
+#include "mozilla/dom/FileSystemUtils.h"
+#include "nsCOMPtr.h"
+#include "nsDebug.h"
+#include "nsIFile.h"
+#include "nsPIDOMWindow.h"
+
+namespace mozilla {
+namespace dom {
+
+OSFileSystem::OSFileSystem(const nsAString& aRootDir)
+{
+  mLocalRootPath = aRootDir;
+  FileSystemUtils::LocalPathToNormalizedPath(mLocalRootPath,
+                                             mNormalizedLocalRootPath);
+
+  // Non-mobile devices don't have the concept of separate permissions to
+  // access different parts of devices storage like Pictures, or Videos, etc.
+  mRequiresPermissionChecks = false;
+
+  mString = mLocalRootPath;
+
+#ifdef DEBUG
+  mPermission.AssignLiteral("never-used");
+#endif
+}
+
+void
+OSFileSystem::Init(nsPIDOMWindow* aWindow)
+{
+  MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
+  MOZ_ASSERT(!mWindow, "No duple Init() calls");
+  MOZ_ASSERT(aWindow);
+  mWindow = aWindow;
+}
+
+nsPIDOMWindow*
+OSFileSystem::GetWindow() const
+{
+  MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
+  return mWindow;
+}
+
+void
+OSFileSystem::GetRootName(nsAString& aRetval) const
+{
+  return aRetval.AssignLiteral("/");
+}
+
+bool
+OSFileSystem::IsSafeFile(nsIFile* aFile) const
+{
+  // The concept of "safe files" is specific to the Device Storage API where
+  // files are only "safe" if they're of a type that is appropriate for the
+  // area of device storage that is being used.
+  MOZ_CRASH("Don't use OSFileSystem with the Device Storage API");
+  return true;
+}
+
+bool
+OSFileSystem::IsSafeDirectory(Directory* aDir) const
+{
+  // The concept of "safe directory" is specific to the Device Storage API
+  // where a directory is only "safe" if it belongs to the area of device
+  // storage that it is being used with.
+  MOZ_CRASH("Don't use OSFileSystem with the Device Storage API");
+  return true;
+}
+
+} // namespace dom
+} // namespace mozilla