[runtime] Replace %to_string_fun with %_ToString.

[runtime] Replace %to_string_fun with %_ToString.

Introduce a new macro TO_STRING that maps to %_ToString and use that
instead of calling into any of the ToString/NonStringToString JavaScript
builtins. Also remove the TO_STRING_INLINE macro, which is basically
obsolete with %_ToString. We still have a few uses of ToString left (via
the utils export mechanism), where we need to investigate whether we
will tank badly if we replace them with TO_STRING as well.

CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_layout_dbg,v8_linux_nosnap_dbg
R=yangguo@chromium.org
BUG=v8:4307
LOG=n

Committed: https://crrev.com/7a7b692b30d50daacc1d054281f723d6c2255ccf
Cr-Commit-Position: refs/heads/master@{#30895}

[Benedikt Meurer, 2015-08-28 12:49:09]

bmeurer@chromium.org changed reviewers:
+ yangguo@chromium.org

[Benedikt Meurer, 2015-08-28 12:49:09]

Hey Yang,

Here's another easy... ripping out builtins one-by-one.
Please take a look.

Thanks,
Benedikt

[Yang, 2015-08-28 12:53:04]

lgtm with a comment.

https://codereview.chromium.org/1323543002/diff/1/test/mjsunit/compiler/jsnat...
File test/mjsunit/compiler/jsnatives.js (left):

https://codereview.chromium.org/1323543002/diff/1/test/mjsunit/compiler/jsnat...
test/mjsunit/compiler/jsnatives.js:32: assertEquals("1", %to_string_fun(1));
IF we are going to remove all JS runtime functions, it makes sense to remove
this test. Otherwise just test call to another JS runtime function, like
%non_string_to_string.

[Benedikt Meurer, 2015-08-28 13:02:35]

The CQ bit was checked by bmeurer@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-08-28 13:02:49]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1323543002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1323543002/1

[commit-bot: I haz the power, 2015-08-28 13:39:57]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-28 13:39:58]

Dry run: Try jobs failed on following builders:
  v8_win_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_win_rel/builds/9184)

[Benedikt Meurer, 2015-08-29 16:37:48]

https://codereview.chromium.org/1323543002/diff/1/test/mjsunit/compiler/jsnat...
File test/mjsunit/compiler/jsnatives.js (left):

https://codereview.chromium.org/1323543002/diff/1/test/mjsunit/compiler/jsnat...
test/mjsunit/compiler/jsnatives.js:32: assertEquals("1", %to_string_fun(1));
Yes, we will remove ALL of them

[Benedikt Meurer, 2015-09-03 10:33:03]

The CQ bit was checked by bmeurer@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-09-03 10:33:08]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1323543002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1323543002/1

[commit-bot: I haz the power, 2015-09-03 10:33:59]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-09-03 10:33:59]

Dry run: Try jobs failed on following builders:
  v8_linux_nodcheck_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_nodcheck_rel/build...)

[Benedikt Meurer, 2015-09-23 19:08:12]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2015-09-23 19:08:12]

The patchset sent to the CQ was uploaded after l-g-t-m from yangguo@chromium.org
Link to the patchset: https://codereview.chromium.org/1323543002/#ps20001
(title: "REBASE. Fixes")

[commit-bot: I haz the power, 2015-09-23 19:08:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1323543002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1323543002/20001

[commit-bot: I haz the power, 2015-09-23 21:46:44]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-09-23 21:47:06]

Patchset 2 (id:??) landed as
https://crrev.com/7a7b692b30d50daacc1d054281f723d6c2255ccf
Cr-Commit-Position: refs/heads/master@{#30895}