Fix AstExpressionVisitor to correctly handle switch + for.

Fix AstExpressionVisitor to correctly handle switch + for.

These were missed by the previous tests,
uncovered in another context.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=test-ast-expression-visitor
R=rossberg@chromium.org,titzer@chromium.org
LOG=N

Committed: https://crrev.com/09b54808b1bdfac9c4dea93796ed8c2a7ffe2f9b
Cr-Commit-Position: refs/heads/master@{#30360}

[rossberg, 2015-08-25 06:33:34]

https://codereview.chromium.org/1316633002/diff/1/src/ast-expression-visitor.cc
File src/ast-expression-visitor.cc (right):

https://codereview.chromium.org/1316633002/diff/1/src/ast-expression-visitor....
src/ast-expression-visitor.cc:116: VisitExpression(label);
Why is the label visited twice?

[bradn, 2015-08-25 07:40:19]

PTAL

https://codereview.chromium.org/1316633002/diff/1/src/ast-expression-visitor.cc
File src/ast-expression-visitor.cc (right):

https://codereview.chromium.org/1316633002/diff/1/src/ast-expression-visitor....
src/ast-expression-visitor.cc:116: VisitExpression(label);
On 2015/08/25 06:33:33, rossberg wrote:
> Why is the label visited twice?

oops, mistake.
Fixed.

[rossberg, 2015-08-25 08:01:05]

lgtm

[bradn, 2015-08-25 16:05:36]

The CQ bit was checked by bradnelson@google.com

[commit-bot: I haz the power, 2015-08-25 16:05:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1316633002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1316633002/20001

[commit-bot: I haz the power, 2015-08-25 16:07:19]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-08-25 16:07:37]

Patchset 2 (id:??) landed as
https://crrev.com/09b54808b1bdfac9c4dea93796ed8c2a7ffe2f9b
Cr-Commit-Position: refs/heads/master@{#30360}