Bug 1722515 - Only build ActivationContext.cpp in mozglue if a11y r=Jamie

Differential Revision: https://phabricator.services.mozilla.com/D121547

mozglue/misc/moz.build

@@ -85,11 +85,15 @@ if CONFIG["OS_ARCH"] == "WINNT":
 
     if not CONFIG["JS_STANDALONE"]:
         SOURCES += [
-            "/ipc/mscom/ActivationContext.cpp",
             "/ipc/mscom/ProcessRuntime.cpp",
             "PreXULSkeletonUI.cpp",
         ]
 
+    if CONFIG["ACCESSIBILITY"]:
+        SOURCES += [
+            "/ipc/mscom/ActivationContext.cpp",
+        ]
+
 elif CONFIG["HAVE_CLOCK_MONOTONIC"]:
     SOURCES += [
         "TimeStamp_posix.cpp",