Add support for lists to the C message reader

Add support for lists to the C message reader

The C message reader can now read lists created like this:

  new List()
  new List<int>()
  new List<String>()
  new List<double>()
  new List<bool>()

The handling of this should be updated when the new external message serialization format is finished.

R=asiva@google.com, turnidge@google.com

BUG=
TEST=

[siva, 2012-01-31 05:09:46]

Do you think this change is necessary if we implment the isolate message
protocol that I detailed in the document that I shared with you.

[Søren Gjesse, 2012-01-31 10:50:03]

We do need to make progress on native messages, so support for Lists is needed.
When the new serialization format is implemented this can easily be adapted, and
the exposed content of the Dart_CObject structures will not be different.

I removed the support for GrowableObjectArray as we don't really need that to
move on. It simplifies things quite a lot.

[turnidge, 2012-01-31 22:16:30]

I scanned this change and didn't see anything to note for you.  I'm relying on
asiva to provide the main review for this change.

On 2012/01/31 10:50:03, Søren Gjesse wrote:
> We do need to make progress on native messages, so support for Lists is
needed.
> When the new serialization format is implemented this can easily be adapted,
and
> the exposed content of the Dart_CObject structures will not be different.
> 
> I removed the support for GrowableObjectArray as we don't really need that to
> move on. It simplifies things quite a lot.

[siva, 2012-02-02 05:47:45]

Would it be possible to update this changelist with the latest changes you have
for the reader, backward references etc.

[Søren Gjesse, 2012-02-02 10:21:44]

This Cl was combined with http://codereview.chromium.org/9303031/.

Closing.