Update StartsWith calls to use new versions in chrome and content

Update StartsWith calls to use new versions in chrome and content

 true -> base::CompareCase::SENSITIVE
 false with punctuation only -> base::CompareCase::SENSITIVE
 false with ascii constants -> base::CompareCase::INSENSITIVE_ASCII
 false with arbitrary string16 -> base::CompareCase::SENSITIVE with base::i18n::ToLower() on the arguments.

BUG=506920, 506255
Committed: https://crrev.com/66d1b81be3d04396da1e92026274a03fa627e933
Cr-Commit-Position: refs/heads/master@{#337439}

[brettw, 2015-07-04 04:43:09]

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

[commit-bot: I haz the power, 2015-07-04 04:43:12]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1214183008/1

[commit-bot: I haz the power, 2015-07-04 05:49:23]

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

[commit-bot: I haz the power, 2015-07-04 05:49:24]

Dry run: This issue passed the CQ dry run.

[brettw, 2015-07-06 17:37:18]

brettw@chromium.org changed reviewers:
+ rockot@chromium.org

[Ken Rockot(use gerrit already), 2015-07-06 17:50:49]

lgtm

[brettw, 2015-07-06 18:14:30]

The CQ bit was checked by brettw@chromium.org

[commit-bot: I haz the power, 2015-07-06 18:15:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1214183008/1

[commit-bot: I haz the power, 2015-07-06 19:29:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-06 19:31:41]

Patchset 1 (id:??) landed as
https://crrev.com/66d1b81be3d04396da1e92026274a03fa627e933
Cr-Commit-Position: refs/heads/master@{#337439}