Bug 1853480 - Part 1: Use TaskController thread stack size as JS stack quota in ScriptLoader off-thread compilation. r=nbp

Differential Revision: https://phabricator.services.mozilla.com/D188556

dom/script/ScriptLoader.cpp

@@ -1827,8 +1827,16 @@ class ScriptOrModuleCompileTask final : public CompileOrDecodeTask {
   }
 
  private:
+  static size_t ThreadStackQuotaForSize(size_t size) {
+    // Set the stack quota to 10% less that the actual size.
+    // NOTE: This follows what JS helper thread does.
+    return size_t(double(size) * 0.9);
+  }
+
   already_AddRefed<JS::Stencil> Compile() {
-    JS::SetNativeStackQuota(mFrontendContext, kDefaultStackQuota);
+    size_t stackSize = TaskController::GetThreadStackSize();
+    JS::SetNativeStackQuota(mFrontendContext,
+                            ThreadStackQuotaForSize(stackSize));
 
     JS::CompilationStorage compileStorage;
     auto compile = [&](auto& source) {