Distinguish null IDBKey (no value) and invalid IDBKey (value is not valid key)

content/browser/in_process_webkit/indexed_db_browsertest.cc

Index: content/browser/in_process_webkit/indexed_db_browsertest.cc
diff --git a/content/browser/in_process_webkit/indexed_db_browsertest.cc b/content/browser/in_process_webkit/indexed_db_browsertest.cc
index 4693b3bf0e14d14de9908dcd284edf499016bd69..095312837e5aebaacf37be9edc48f73f3dfb6581 100644
--- a/content/browser/in_process_webkit/indexed_db_browsertest.cc
+++ b/content/browser/in_process_webkit/indexed_db_browsertest.cc
@@ -60,19 +60,16 @@ class IndexedDBBrowserTest : public InProcessBrowserTest {
   }
 };
 
-// TODO(jsbell): Disabled to land WK76487; http://crbug.com/110956 has fix.
-IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTest, DISABLED_CursorTest) {
+IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTest, CursorTest) {
   SimpleTest(testUrl(FilePath(FILE_PATH_LITERAL("cursor_test.html"))));
 }
 
-// TODO(jsbell): Disabled to land WK76487; http://crbug.com/110956 has fix.
-IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTest, DISABLED_CursorTestIncognito) {
+IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTest, CursorTestIncognito) {
   SimpleTest(testUrl(FilePath(FILE_PATH_LITERAL("cursor_test.html"))),
              true /* incognito */);
 }
 
-// TODO(jsbell): Disabled to land WK76487; http://crbug.com/110956 has fix.
-IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTest, DISABLED_CursorPrefetch) {
+IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTest, CursorPrefetch) {
   SimpleTest(testUrl(FilePath(FILE_PATH_LITERAL("cursor_prefetch.html"))));
 }