[main-custom] Support D8 bomb-workers

Merge over our internal changes to the main-custom branch.

Sources:
- https://crrev.com/i/7397481
- https://crrev.com/i/7431936
- https://crrev.com/i/7448617

Change-Id: I4dcb2042afecd3f84aed717f70356bb24a692ef5
Reviewed-on: https://chromium-review.googlesource.com/c/external/github.com/WebKit/JetStream/+/6651528
Reviewed-by: Daniel Lehmann <dlehmann@chromium.org>

JetStreamDriver.js

@@ -482,7 +482,7 @@ class Driver {
     }
 
     async prefetchResourcesForBrowser() {
-        if (!isInBrowser)
+        if (!isInBrowser && !isD8)
             return;
 
         const promises = [];
@@ -776,8 +776,13 @@ class Benchmark {
 
         if (this.plan.preload) {
             let str = "";
-            for (let [variableName, blobUrl] of this.preloads)
-                str += `const ${variableName} = "${blobUrl}";\n`;
+            if (isD8) {
+                for (let [variableName, filePath] of Object.entries(this.plan.preload))
+                    str += `const ${variableName} = "${filePath}";\n`;
+            } else {
+                for (let [variableName, blobUrl] of this.preloads)
+                    str += `const ${variableName} = "${blobUrl}";\n`;
+            }
             addScript(str);
         }
 
@@ -902,6 +907,8 @@ class Benchmark {
     }
 
     prefetchResourcesForBrowser() {
+        if (isD8)
+          return this.prefetchResourcesForD8();
         if (!isInBrowser)
             return;
         const promises = this.plan.files.map((file) => this.loadBlob("file", null, file).then((blobData) => {
@@ -968,6 +975,10 @@ class Benchmark {
         return !counter.failedPreloadResources && counter.loadedResources == counter.totalResources;
     }
 
+    prefetchResourcesForD8() {
+        // For d8 we just keep the file name
+    }
+
     async retryPrefetchResourcesForBrowser() {
         if (!isInBrowser)
             return;

worker/async-task.js

@@ -599,8 +599,10 @@ class AsyncTaskWorker {
         else {
             var self = this;
             setTimeout(function () {
-                if (self._currentTaskId == null)
+                if (self._currentTaskId == null) {
                     AsyncTaskWorker._workerSet.delete(self);
+                    self._webWorker.terminate();
+                }
             }, 1000);
         }
 

worker/bomb.js

@@ -41,7 +41,7 @@ function startWorker(file) {
 }
 
 function startCycle() {
-    if (!isInBrowser)
+    if (!isInBrowser && !isD8)
         throw new Error("Only works in browser");
 
     const tests = [

worker/segmentation.js

@@ -599,8 +599,10 @@ class AsyncTaskWorker {
         else {
             var self = this;
             setTimeout(function () {
-                if (self._currentTaskId == null)
+                if (self._currentTaskId == null) {
                     AsyncTaskWorker._workerSet.delete(self);
+                     self._webWorker.terminate();
+                }
             }, 1000);
         }