Fixing up some APIs to allow Web DB to work from dart and adding tests.

tests/html/html.status

Index: tests/html/html.status
diff --git a/tests/html/html.status b/tests/html/html.status
index 155df79891d58ff0ba9a2d8d64ed92f788963c46..e36f4bf1fa29b4544e429b8882cdf101bd9009cf 100644
--- a/tests/html/html.status
+++ b/tests/html/html.status
@@ -21,6 +21,7 @@ xhr_cross_origin_test: Skip  # Issue 4502: Passes with --allow-external-pages.
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium) ]
 request_animation_frame_test: Skip   # drt hangs; requestAnimationFrame not implemented
+websql_test: Fail #4645 dartium does not support web SQL
 #htmloptionscollection_test: Fail # TODO(asiva): investigate.
 js_interop_2_test: Fail  # Issue 4651
 
@@ -67,6 +68,7 @@ localstorage_test: Fail
 node_test: Fail
 svgelement_test: Fail
 svgelement2_test: Fail
+websql_test: Fail # IE does not support web SQL
 #
 # Investigate and triage the following into bug reports.
 #
@@ -151,6 +153,7 @@ typed_arrays_dataview_test: Fail  # DataView not implemented until Firefox 15.0
 # framework, frog no longer resolves forEach statically, and instead it
 # dynamically binds forEach on a bunch of classes, including HTMLCollection.
 typing_test: Pass
+websql_test: Fail # FF does not support web SQL
 websocket_test: Pass, Fail # FF 10 is uses MozWebSocket, FF 11 uses WebSocket.
 # Exception... "Access to restricted URI denied" code: "1012" nsresult: "0x805303f4
 #    (NS_ERROR_DOM_BAD_URI) ...