Update Sandcastle to tolerate recent changes to Chrome.
Update error line number handling for Firefox & Chrome

Now a DeveloperError with a stack trace that includes your Sandcastle
code will highlight the line of your code from its first appearance
in the trace.  For example, try calling `primitives.add(undefined);`.
Merge pull request #1135 from AnalyticalGraphicsInc/chrome-sandcastle

Update Sandcastle to tolerate recent changes to Chrome.