Added Message::GetScripOrigin.
Replaced Message::GetResourceName with GetScriptOrigin().ResourceName().

Now, GetScriptOrigin().ResourceName() function returns the resource name or sourceURL (from //# sourceURL=) for the script from where the function causing the error originates.

Method GetScriptResourceName() deprecated. Use GetScriptOrigin()->ResourceName() instead.

Function used in Blink: https://codereview.chromium.org/260513004/

R=yangguo@chromium.org, yurys@chromium.org

Review URL: https://codereview.chromium.org/265593002

Patch from Alexey Kozyatinskiy <kozyatinskiy@google.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21893 ce2b1a6d-e550-0410-aec6-3dcde31c8c00