Fix incorrect tests for storage APIs in data: URL workers

Removed localStorage test as localStorage is never exposed to workers.

IndexedDB spec will be updated to throw when used from opaque origins.
(w3c/IndexedDB#150)

Added a new test for webdatabase.

BUG=270979

Review-Url: https://codereview.chromium.org/2697003002
Cr-Commit-Position: refs/heads/master@{#450654}

third_party/WebKit/LayoutTests/external/wpt/workers/data-url-shared.html

@@ -26,11 +26,13 @@
 // Communications goes both ways
 assert_worker_sends_pass('communication goes both ways', 'application/javascript', 'port.onmessage = function(e) { port.postMessage("PASS"); }');
 
-// 'data:' workers are cross-origin
+// test access to storage APIs
+// once https://github.com/w3c/IndexedDB/pull/150 lands, this is spec conforming
 assert_worker_throws('indexedDB inaccessible', 'self.indexedDB.open("someDBName")');
-assert_worker_throws('localStorage inaccessible', 'self.localStorage.testItem');
-assert_worker_sends_pass('cross-origin worker', '', 'fetch("/").then(() => port.postMessage("FAIL"), () => port.postMessage("PASS"))');
+assert_worker_throws('Web SQL Database inaccessible', 'self.openDatabase("someDBName", "1.0", "someDBName", 1);');
 
+// 'data:' workers are cross-origin
+assert_worker_sends_pass('cross-origin worker', '', 'fetch("/").then(() => port.postMessage("FAIL"), () => port.postMessage("PASS"))');
 // 'data:' workers have opaque origin
 assert_worker_sends_pass('worker has opaque origin', 'application/javascript', 'if (self.location.origin == "null") port.postMessage("PASS"); else port.postMessage("FAIL");');
 </script>

third_party/WebKit/LayoutTests/external/wpt/workers/data-url.html

@@ -41,9 +41,12 @@
 // Communications goes both ways
 assert_worker_sends_pass('communication goes both ways', 'application/javascript', 'onmessage = function(e) { self.postMessage("PASS"); }');
 
-// 'data:' workers are cross-origin
+// test access to storage APIs
+// once https://github.com/w3c/IndexedDB/pull/150 lands, this is spec conforming
 assert_worker_throws('indexedDB inaccessible', 'self.indexedDB.open("someDBName")');
-assert_worker_throws('localStorage inaccessible', 'self.localStorage.testItem');
+assert_worker_throws('Web SQL Database inaccessible', 'self.openDatabase("someDBName", "1.0", "someDBName", 1);');
+
+// 'data:' workers are cross-origin
 assert_worker_sends_pass('cross-origin worker', '', 'fetch("/").then(() => self.postMessage("FAIL"), () => self.postMessage("PASS"))');
 
 // 'data:' workers have opaque origin