Bug 1879975 - Newer versions of Windows disable pinning to the taskbar using older methods r=mpohle,bhearsum,nrishel,glandium,nalexander

This is adding in the new Windows 11 only version of taskbar pinning. For the new pinning to work, we need to use limited access feature tokens. Those are going to be made private and aren't included with this change.
This change will compile, and will work if built against the correct limited access feature tokens, as specified in developer local machine config files, but for every other build, the new taskbar pinning won't work and will fall back to the old methods.
I will implement the try / release building machines using the secret limited access feature tokens in a follow-up diff.

Differential Revision: https://phabricator.services.mozilla.com/D205004

browser/components/shell/nsWindowsShellService.cpp

@@ -39,6 +39,7 @@
 #include "nsIXULAppInfo.h"
 #include "nsINIParser.h"
 #include "nsNativeAppSupportWin.h"
+#include "Windows11TaskbarPinning.h"
 
 #include <windows.h>
 #include <shellapi.h>
@@ -1626,7 +1627,7 @@ nsWindowsShellService::GetTaskbarTabPins(nsTArray<nsString>& aShortcutPaths) {
 
 static nsresult PinCurrentAppToTaskbarWin10(bool aCheckOnly,
                                             const nsAString& aAppUserModelId,
-                                            nsAutoString aShortcutPath) {
+                                            const nsAString& aShortcutPath) {
   // The behavior here is identical if we're only checking or if we try to pin
   // but the app is already pinned so we update the variable accordingly.
   if (!aCheckOnly) {
@@ -1695,6 +1696,28 @@ static nsresult PinCurrentAppToTaskbarImpl(
     }
   }
 
+  auto pinWithWin11TaskbarAPIResults =
+      PinCurrentAppToTaskbarWin11(aCheckOnly, aAppUserModelId, shortcutPath);
+  switch (pinWithWin11TaskbarAPIResults.result) {
+    case Win11PinToTaskBarResultStatus::NotSupported:
+      // Fall through to the win 10 mechanism
+      break;
+
+    case Win11PinToTaskBarResultStatus::Success:
+    case Win11PinToTaskBarResultStatus::AlreadyPinned:
+      return NS_OK;
+
+    case Win11PinToTaskBarResultStatus::NotCurrentlyAllowed:
+    case Win11PinToTaskBarResultStatus::Failed:
+      // return NS_ERROR_FAILURE;
+
+      // Fall through to the old mechanism for now
+      // In future, we should be sending telemetry for when
+      // an error occurs or for when pinning is not allowed
+      // with the Win 11 APIs.
+      break;
+  }
+
   return PinCurrentAppToTaskbarWin10(aCheckOnly, aAppUserModelId, shortcutPath);
 }
 
@@ -1720,7 +1743,7 @@ static nsresult PinCurrentAppToTaskbarAsyncImpl(bool aCheckOnly,
   }
 
   nsAutoString aumid;
-  if (NS_WARN_IF(!mozilla::widget::WinTaskbar::GenerateAppUserModelID(
+  if (NS_WARN_IF(!mozilla::widget::WinTaskbar::GetAppUserModelID(
           aumid, aPrivateBrowsing))) {
     return NS_ERROR_FAILURE;
   }