[unified-heap] Fix indexdb liveness layout tests

Replace direct GC calls that expect objects to die with asyncGC calls
that are guaranteed to run without stack.

Bug: chromium:843903
Change-Id: Ie708567fae153d0f1a20109fe170025afdc1715b
Reviewed-on: https://chromium-review.googlesource.com/1238451Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593551}

third_party/WebKit/LayoutTests/storage/indexeddb/connection-leak-expected.txt

@@ -25,7 +25,6 @@ db = request.result
 db = null
 request = null
 Run GC outside of request's callback via setTimeout()
-window.gc()
 
 doThirdOpen():
 request = indexedDB.open(dbname, 2)

third_party/WebKit/LayoutTests/storage/indexeddb/connection-leak.html

@@ -48,10 +48,9 @@ function doSecondOpen()
         evalAndLog("request = null");
 
         debug("Run GC outside of request's callback via setTimeout()");
-        setTimeout( function() {
-            evalAndLog("window.gc()");
+        asyncGC(function () {
             doThirdOpen();
-        }, 0);
+        });
     };
 }
 

third_party/WebKit/LayoutTests/storage/indexeddb/cursor-leak.html

@@ -49,10 +49,10 @@ function onOpen(evt)
         cursorRequest = null;
         cursor = null;
 
-        gc();
-
-        shouldBeTrue("cursorObserver.wasCollected");
-        finishJSTest();
+        asyncGC(function () {
+            shouldBeTrue("cursorObserver.wasCollected");
+            finishJSTest();
+        });
     };
 }
 

third_party/WebKit/LayoutTests/storage/indexeddb/delete-closed-database-object-expected.txt

@@ -9,7 +9,6 @@ indexedDB.open(dbname)
 db.close()
 indexedDB.open(dbname)
 Dropping references to new connection.
-gc()
 Open request should not receive a blocked event:
 indexedDB.open(dbname, 2)
 PASS successfullyParsed is true

third_party/WebKit/LayoutTests/storage/indexeddb/resources/delete-closed-database-object.js

@@ -10,6 +10,15 @@ function prepareDatabase()
 {
 }
 
+function setVersion()
+{
+    debug("Open request should not receive a blocked event:");
+    var request = evalAndLog("indexedDB.open(dbname, 2)");
+    request.onerror = unexpectedErrorCallback;
+    request.onblocked = unexpectedBlockedCallback;
+    request.onsuccess = finishJSTest;
+}
+
 function openSuccess()
 {
     db = event.target.result;
@@ -23,16 +32,8 @@ function openSuccess()
         debug("Dropping references to new connection.");
         // After leaving this function, there are no remaining references to the
         // db, so it should get deleted.
-        setTimeout(setVersion, 2);
+        setTimeout(function () {
+            asyncGC(setVersion);
+        }, 2);
     };
 }
-
-function setVersion()
-{
-    evalAndLog("gc()");
-    debug("Open request should not receive a blocked event:");
-    var request = evalAndLog("indexedDB.open(dbname, 2)");
-    request.onerror = unexpectedErrorCallback;
-    request.onblocked = unexpectedBlockedCallback;
-    request.onsuccess = finishJSTest;
-}