Add parsing for type aliases

Add parsing for type aliases

This is based on https://codereview.chromium.org/1841093002

R=rossberg@chromium.org
BUG=
NOTRY=true
NOPRESUBMIT=true

[rossberg, 2016-04-18 09:27:43]

lgtm

https://codereview.chromium.org/1839393002/diff/1/test/cctest/test-parsing.cc
File test/cctest/test-parsing.cc (right):

https://codereview.chromium.org/1839393002/diff/1/test/cctest/test-parsing.cc...
test/cctest/test-parsing.cc:7853: "type Err<> = number",
How about "type", with no identifier following.

[nickie, 2016-04-19 13:52:51]

https://codereview.chromium.org/1839393002/diff/1/test/cctest/test-parsing.cc
File test/cctest/test-parsing.cc (right):

https://codereview.chromium.org/1839393002/diff/1/test/cctest/test-parsing.cc...
test/cctest/test-parsing.cc:7853: "type Err<> = number",
On 2016/04/18 09:27:43, rossberg wrote:
> How about "type", with no identifier following.

Done.

We agreed that "type = number" should parse as an assignment of identifier
"number" to identifier "type", even in typed mode.  I'm making the necessary
changes and adding the test.

For a valid type alias declaration in typed mode, the contextual keyword "type"
must be followed by an identifier.  As in the case of "let", this will be so
even if there is a line terminator in between.

[nickie, 2016-04-19 14:10:48]

Patchset 2 landed MANUALLY in experimental/nikolaos/types as:
6a143f3ce27309fa0537144e449cbfcfe2bc4dae
https://chromium.googlesource.com/v8/v8/+/6a143f3ce27309fa0537144e449cbfcfe2b...

[nickie, 2016-04-19 14:11:03]

Description was changed from

==========
Add parsing for type aliases

This is based on https://codereview.chromium.org/1841093002

R=rossberg@chromium.org
BUG=
NOTRY=true
NOPRESUBMIT=true
==========

to

==========
Add parsing for type aliases

This is based on https://codereview.chromium.org/1841093002

R=rossberg@chromium.org
BUG=
NOTRY=true
NOPRESUBMIT=true
==========