[turbofan] Turn JSBuiltinReducer into an AdvancedReducer.

[turbofan] Turn JSBuiltinReducer into an AdvancedReducer.

This in turn allows usage of AdvancedReducer::ReplaceWithValue which
has access to the underlying graph reducer. It will allow us to deal
with exception continuations correctly.

R=titzer@chromium.org

Committed: https://crrev.com/a6f23850a5106931c4e73e8ce0f339ec917b36a5
Cr-Commit-Position: refs/heads/master@{#28813}

[Michael Starzinger, 2015-06-05 11:59:10]

Patchset #2 (id:20001) has been deleted

[Michael Starzinger, 2015-06-05 12:01:02]

Patchset #2 (id:40001) has been deleted

[titzer, 2015-06-05 12:30:51]

lgtm

https://codereview.chromium.org/1158273011/diff/60001/test/unittests/compiler...
File test/unittests/compiler/js-builtin-reducer-unittest.cc (right):

https://codereview.chromium.org/1158273011/diff/60001/test/unittests/compiler...
test/unittests/compiler/js-builtin-reducer-unittest.cc:29: // TODO(titzer): mock
the GraphReducer here for better unit testing.
u wot m8?

[Michael Starzinger, 2015-06-05 12:36:09]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2015-06-05 12:36:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1158273011/60001

[commit-bot: I haz the power, 2015-06-05 12:37:52]

Committed patchset #2 (id:60001)

[commit-bot: I haz the power, 2015-06-05 12:37:56]

Patchset 2 (id:??) landed as
https://crrev.com/a6f23850a5106931c4e73e8ce0f339ec917b36a5
Cr-Commit-Position: refs/heads/master@{#28813}