From 4f82d71df070e813927893fc20aa7954fbae997d Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@gmail.com>
Date: Mon, 19 Feb 2018 16:28:18 +0100
Subject: Remove Windows shell integration checks for Windows Vista.

Tag #22.
---
 browser/components/shell/nsWindowsShellService.cpp |  5 -----
 xpcom/io/SpecialSystemDirectory.cpp                | 15 ++-------------
 xpcom/io/nsLocalFileWin.cpp                        | 13 +++++--------
 3 files changed, 7 insertions(+), 26 deletions(-)

diff --git a/browser/components/shell/nsWindowsShellService.cpp b/browser/components/shell/nsWindowsShellService.cpp
index cb13c0910..879b0c7f0 100644
--- a/browser/components/shell/nsWindowsShellService.cpp
+++ b/browser/components/shell/nsWindowsShellService.cpp
@@ -648,11 +648,6 @@ nsWindowsShellService::LaunchControlPanelDefaultsSelectionUI()
 nsresult
 nsWindowsShellService::LaunchControlPanelDefaultPrograms()
 {
-  // This Default Programs feature is Win7+ only.
-  if (!IsWin7OrLater()) {
-    return NS_ERROR_FAILURE;
-  }
-
   // Build the path control.exe path safely
   WCHAR controlEXEPath[MAX_PATH + 1] = { '\0' };
   if (!GetSystemDirectoryW(controlEXEPath, MAX_PATH)) {
diff --git a/xpcom/io/SpecialSystemDirectory.cpp b/xpcom/io/SpecialSystemDirectory.cpp
index 347ed186a..ab65d38f9 100644
--- a/xpcom/io/SpecialSystemDirectory.cpp
+++ b/xpcom/io/SpecialSystemDirectory.cpp
@@ -19,9 +19,6 @@
 #include <shlobj.h>
 #include <knownfolders.h>
 #include <guiddef.h>
-#include "mozilla/WindowsVersion.h"
-
-using mozilla::IsWin7OrLater;
 
 #elif defined(XP_UNIX)
 
@@ -115,19 +112,13 @@ SHLoadLibraryFromKnownFolder(REFKNOWNFOLDERID aFolderId, DWORD aMode,
 }
 
 /*
- * Check to see if we're on Win7 and up, and if so, returns the default
- * save-to location for the Windows Library passed in through aFolderId.
- * Otherwise falls back on pre-win7 GetWindowsFolder.
+ * Return the default save-to location for the Windows Library passed in
+ * through aFolderId.
  */
 static nsresult
 GetLibrarySaveToPath(int aFallbackFolderId, REFKNOWNFOLDERID aFolderId,
                      nsIFile** aFile)
 {
-  // Skip off checking for library support if the os is Vista or lower.
-  if (!IsWin7OrLater()) {
-    return GetWindowsFolder(aFallbackFolderId, aFile);
-  }
-
   RefPtr<IShellLibrary> shellLib;
   RefPtr<IShellItem> savePath;
   HRESULT hr =
@@ -716,8 +707,6 @@ GetSpecialSystemDirectory(SystemDirectories aSystemSystemDirectory,
     }
 #if defined(MOZ_CONTENT_SANDBOX)
     case Win_LocalAppdataLow: {
-      // This should only really fail on versions pre-Vista, in which case this
-      // shouldn't have been used in the first place.
       GUID localAppDataLowGuid = FOLDERID_LocalAppDataLow;
       return GetKnownFolder(&localAppDataLowGuid, aFile);
     }
diff --git a/xpcom/io/nsLocalFileWin.cpp b/xpcom/io/nsLocalFileWin.cpp
index 3a7e570f5..66e267807 100644
--- a/xpcom/io/nsLocalFileWin.cpp
+++ b/xpcom/io/nsLocalFileWin.cpp
@@ -7,7 +7,6 @@
 #include "mozilla/ArrayUtils.h"
 #include "mozilla/DebugOnly.h"
 #include "mozilla/UniquePtrExtensions.h"
-#include "mozilla/WindowsVersion.h"
 
 #include "nsCOMPtr.h"
 #include "nsAutoPtr.h"
@@ -1970,13 +1969,11 @@ nsLocalFile::CopySingleFile(nsIFile* aSourceFile, nsIFile* aDestParent,
   // So we only use COPY_FILE_NO_BUFFERING when we have a remote drive.
   int copyOK;
   DWORD dwCopyFlags = COPY_FILE_ALLOW_DECRYPTED_DESTINATION;
-  if (IsVistaOrLater()) {
-    bool path1Remote, path2Remote;
-    if (!IsRemoteFilePath(filePath.get(), path1Remote) ||
-        !IsRemoteFilePath(destPath.get(), path2Remote) ||
-        path1Remote || path2Remote) {
-      dwCopyFlags |= COPY_FILE_NO_BUFFERING;
-    }
+  bool path1Remote, path2Remote;
+  if (!IsRemoteFilePath(filePath.get(), path1Remote) ||
+      !IsRemoteFilePath(destPath.get(), path2Remote) ||
+      path1Remote || path2Remote) {
+    dwCopyFlags |= COPY_FILE_NO_BUFFERING;
   }
 
   if (!move) {
-- 
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