Implement new syntax for ImportDeclarations

Implemented new syntax for ImportDeclarations

Also had to split ParseImportsList and ParseExportClause into separate
methods as they have different rules about reserved words and arguments/eval.

Added lots more test cases, including some export cases that were missed before
due to incorrect checking of reserved words.

BUG=v8:1569
LOG=n

Committed: https://crrev.com/0c928d533a3418d982a97fdaa45f6e55e34ae039
Cr-Commit-Position: refs/heads/master@{#26338}

[adamk, 2015-01-30 01:16:31]

adamk@chromium.org changed reviewers:
+ arv@chromium.org, rossberg@chromium.org

[arv (Not doing code reviews), 2015-01-30 02:34:45]

LGTM

https://codereview.chromium.org/887843002/diff/1/test/cctest/test-parsing.cc
File test/cctest/test-parsing.cc (right):

https://codereview.chromium.org/887843002/diff/1/test/cctest/test-parsing.cc#...
test/cctest/test-parsing.cc:4823: 
Maybe add?

import {x}, def from 'm.js';
import def, def2 from 'm.js';
import * as x, def from 'm.js';
import * as x, * as y from 'm.js';
import {x}, {y} from 'm.js';

to make sure that only the combinations provided by the spec works.

[adamk, 2015-01-30 03:04:19]

https://codereview.chromium.org/887843002/diff/1/test/cctest/test-parsing.cc
File test/cctest/test-parsing.cc (right):

https://codereview.chromium.org/887843002/diff/1/test/cctest/test-parsing.cc#...
test/cctest/test-parsing.cc:4823: 
On 2015/01/30 02:34:45, arv wrote:
> Maybe add?
> 
> import {x}, def from 'm.js';
> import def, def2 from 'm.js';
> import * as x, def from 'm.js';
> import * as x, * as y from 'm.js';
> import {x}, {y} from 'm.js';
> 
> to make sure that only the combinations provided by the spec works.

Thanks, added, plus another bogus form.

[adamk, 2015-01-30 03:05:04]

The CQ bit was checked by adamk@chromium.org

[commit-bot: I haz the power, 2015-01-30 03:05:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/887843002/20001

[commit-bot: I haz the power, 2015-01-30 03:26:57]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-01-30 03:27:17]

Patchset 2 (id:??) landed as
https://crrev.com/0c928d533a3418d982a97fdaa45f6e55e34ae039
Cr-Commit-Position: refs/heads/master@{#26338}