IndexedDB: Log exception messages

LayoutTests/storage/indexeddb/resources/shared.js

 var jsTestIsAsync = true;
 if (self.importScripts && !self.postMessage) {
     // Shared worker.  Make postMessage send to the newest client, which in
     // our tests is the only client.
 
     // Store messages for sending until we have somewhere to send them.
     self.postMessage = function(message)
     {
         if (typeof self.pendingMessages === "undefined")
             self.pendingMessages = [];
@@ skipping 79 matching lines @@
         testFailed("No exception thrown! Should have been " + exceptionCode);
     } catch (e) {
         code = e.code;
         if (!_quiet)
             testPassed("Exception was thrown.");
         shouldBe("code", exceptionCode, _quiet);
         if (exceptionName) {
             ename = e.name;
             shouldBe("ename", exceptionName, _quiet);
         }
+        if (!_quiet)
+            debug("Exception message: " + e.message);

[jsbell, 2013/07/12 18:45:31]

This is the test helper change.

     }
 }
 
 function evalAndExpectExceptionClass(cmd, expected)
 {
     debug("Expecting " + expected + " exception from " + cmd);
     try {
         eval(cmd);
         testFailed("No exception thrown!" );
     } catch (e) {
@@ skipping 105 matching lines @@
 
     requests.forEach(function(req) {
         req.onsuccess = function() {
             --count;
             if (!count)
                 callback(requests);
         };
         req.onerror = unexpectedErrorCallback;
     });
 }