Speed up tests for optimized code sharing.

Speed up tests for optimized code sharing.

Note that this tests performed unnecessary many iterations which led to
long runtimes in debug mode and also caused flaky GCs during that would
cause the optimized code map to be flushed and violated assumptions.

R=yangguo@chromium.org
BUG=v8:4363
LOG=N

Committed: https://crrev.com/e8a399c0a09b344b1f7d18fc340ee2228f6efeec
Cr-Commit-Position: refs/heads/master@{#30070}

[Yang, 2015-08-07 13:18:52]

On 2015/08/07 13:17:17, Michael Starzinger wrote:

lgtm.

[Michael Starzinger, 2015-08-07 13:23:00]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2015-08-07 13:23:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1280973002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1280973002/1

[commit-bot: I haz the power, 2015-08-07 13:39:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-07 13:39:06]

Patchset 1 (id:??) landed as
https://crrev.com/e8a399c0a09b344b1f7d18fc340ee2228f6efeec
Cr-Commit-Position: refs/heads/master@{#30070}