[wasm] Make {AsyncCompileJob::context} a native context.

R=ahaas@chromium.org

Change-Id: I9cf40958978f8ebcc34d4c9d15ea301e54829229
Reviewed-on: https://chromium-review.googlesource.com/1125076
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54201}

src/wasm/module-compiler.cc

@@ -2197,7 +2197,8 @@ AsyncCompileJob::AsyncCompileJob(
   foreground_task_runner_ = platform->GetForegroundTaskRunner(v8_isolate);
   // The handle for the context must be deferred.
   DeferredHandleScope deferred(isolate);
-  context_ = Handle<Context>(*context, isolate);
+  native_context_ = Handle<Context>(context->native_context(), isolate);
+  DCHECK(native_context_->IsNativeContext());
   deferred_handles_.push_back(deferred.Detach());
 }
 
@@ -2308,7 +2309,7 @@ class AsyncCompileJob::CompileStep {
       --job_->num_pending_foreground_tasks_;
       DCHECK_EQ(0, job_->num_pending_foreground_tasks_);
       SaveContext saved_context(job_->isolate_);
-      job_->isolate_->set_context(*job_->context_);
+      job_->isolate_->set_context(*job_->native_context_);
       RunInForeground();
     } else {
       RunInBackground();
@@ -2505,9 +2506,7 @@ class AsyncCompileJob::PrepareAndStartCompile : public CompileStep {
               case CompilationEvent::kFinishedBaselineCompilation:
                 if (job->DecrementAndCheckFinisherCount()) {
                   SaveContext saved_context(job->isolate());
-                  // TODO(mstarzinger): Make {AsyncCompileJob::context} point
-                  // to the native context and also rename to {native_context}.
-                  job->isolate()->set_context(job->context_->native_context());
+                  job->isolate()->set_context(*job->native_context_);
                   job->FinishCompile();
                 }
                 return;
@@ -2531,7 +2530,7 @@ class AsyncCompileJob::PrepareAndStartCompile : public CompileStep {
                             ->baseline_compilation_finished());
 
                 SaveContext saved_context(job->isolate());
-                job->isolate()->set_context(job->context_->native_context());
+                job->isolate()->set_context(*job->native_context_);
                 Handle<Object> error = thrower->Reify();
 
                 DeferredHandleScope deferred(job->isolate());

src/wasm/module-compiler.h

@@ -144,7 +144,7 @@ class AsyncCompileJob {
   // Reference to the wire bytes (hold in {bytes_copy_} or as part of
   // {native_module_}).
   ModuleWireBytes wire_bytes_;
-  Handle<Context> context_;
+  Handle<Context> native_context_;
   std::unique_ptr<CompilationResultResolver> resolver_;
   std::shared_ptr<const WasmModule> module_;