Fire window.onerror for uncaught IndexedDB errors

third_party/WebKit/LayoutTests/storage/indexeddb/resources/observer.js

Index: third_party/WebKit/LayoutTests/storage/indexeddb/resources/observer.js
diff --git a/third_party/WebKit/LayoutTests/storage/indexeddb/resources/observer.js b/third_party/WebKit/LayoutTests/storage/indexeddb/resources/observer.js
index dfcf7295440e7e2788cec51475714d9e63e9bcbe..9445dbc0facae5e112b26a65da71694accf245a3 100644
--- a/third_party/WebKit/LayoutTests/storage/indexeddb/resources/observer.js
+++ b/third_party/WebKit/LayoutTests/storage/indexeddb/resources/observer.js
@@ -5,6 +5,7 @@ if (this.importScripts) {
 
 async_test(function(t) {
   var dbname = location.pathname + ' - ' + 'empty transaction';
+  indexedDB.deleteDatabase(dbname);
   var openRequest = indexedDB.open(dbname);
   var callback_count = 0;
   var obs = new IDBObserver(t.step_func(function() { callback_count++; }));
@@ -32,6 +33,7 @@ async_test(function(t) {
 
 async_test(function(t) {
   var dbname = location.pathname + ' - ' + 'observer in version change';
+  indexedDB.deleteDatabase(dbname);
   var openRequest = indexedDB.open(dbname);
   var callback_count = 0;
   var obs;
@@ -60,6 +62,7 @@ async_test(function(t) {
 
 async_test(function(t) {
   var dbname = location.pathname + ' - ' + 'ignore observe call';
+  indexedDB.deleteDatabase(dbname);
   var openRequest = indexedDB.open(dbname);
   var callback_count = 0;
   var obs = new IDBObserver(t.step_func(function() { callback_count++; }));
@@ -82,6 +85,7 @@ async_test(function(t) {
 
 async_test(function(t) {
   var dbname = location.pathname + ' - ' + 'abort associated transaction';
+  indexedDB.deleteDatabase(dbname);
   var openRequest = indexedDB.open(dbname);
   var callback_count = 0;
   var obs = new IDBObserver(t.step_func(function() { callback_count++; }));
@@ -90,6 +94,10 @@ async_test(function(t) {
   });
   openRequest.onsuccess = t.step_func(function() {
     var db = openRequest.result;
+
+    // Prevent propagation to global error handler.
+    db.onerror = e => { e.preventDefault(); };
+
     var tx1 = db.transaction('store', 'readwrite');
     var tx2 = db.transaction('store', 'readwrite');
     tx1.objectStore('store').get(1);
@@ -111,6 +119,7 @@ async_test(function(t) {
 
 async_test(function(t) {
   var dbname = location.pathname + ' - ' + 'abort transaction';
+  indexedDB.deleteDatabase(dbname);
   var openRequest = indexedDB.open(dbname);
   var callback_count = 0;
   var obs = new IDBObserver(t.step_func(function() { callback_count++; }));
@@ -119,6 +128,10 @@ async_test(function(t) {
   });
   openRequest.onsuccess = t.step_func(function() {
     var db = openRequest.result;
+
+    // Prevent propagation to global error handler.
+    db.onerror = e => { e.preventDefault(); };
+
     var tx1 = db.transaction('store', 'readwrite');
     var tx2 = db.transaction('store', 'readwrite');
     var tx3 = db.transaction('store', 'readwrite');
@@ -143,4 +156,4 @@ async_test(function(t) {
   });
 }, 'Abort transaction recorded by observer');
 
-done();
+done();