Move more string_util functions to base namespace.

Move more string_util functions to base namespace.

Rename IsWhitespace to IsUnicodeWhitespace (to contrast it to the already-existing IsAsciiWhitespace).

De-inline HexDigitToInt. This is only used in a few places and I don't think it's necessary to inline.

Remove some redundant base:: qualifications in base.

TBR=sky

Committed: https://crrev.com/b3413064f36bf166d7dffb463bc442059dab1dd7
Cr-Commit-Position: refs/heads/master@{#335827}

[brettw, 2015-06-22 23:16:52]

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

[brettw, 2015-06-22 23:16:58]

The CQ bit was checked by brettw@chromium.org

[commit-bot: I haz the power, 2015-06-22 23:17:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1200053004/40001

[commit-bot: I haz the power, 2015-06-22 23:47:07]

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

[commit-bot: I haz the power, 2015-06-22 23:47:09]

Try jobs failed on following builders:
  linux_chromium_compile_dbg_32_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[brettw, 2015-06-23 00:21:38]

The CQ bit was checked by brettw@chromium.org

[commit-bot: I haz the power, 2015-06-23 00:22:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1200053004/40001

[commit-bot: I haz the power, 2015-06-23 00:43:06]

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

[commit-bot: I haz the power, 2015-06-23 00:43:08]

Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)

[brettw, 2015-06-23 19:23:02]

The CQ bit was checked by brettw@chromium.org

[commit-bot: I haz the power, 2015-06-23 19:23:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1200053004/40001

[commit-bot: I haz the power, 2015-06-23 19:53:00]

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

[commit-bot: I haz the power, 2015-06-23 19:53:04]

Exceeded global retry quota

[brettw, 2015-06-23 21:12:53]

The CQ bit was checked by brettw@chromium.org

[commit-bot: I haz the power, 2015-06-23 21:14:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1200053004/60001

[commit-bot: I haz the power, 2015-06-23 22:45:30]

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

[commit-bot: I haz the power, 2015-06-23 22:45:33]

Try jobs failed on following builders:
  cast_shell_linux on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/cast_shell_linu...)

[brettw, 2015-06-23 23:54:34]

The CQ bit was checked by brettw@chromium.org

[commit-bot: I haz the power, 2015-06-23 23:57:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1200053004/60001

[commit-bot: I haz the power, 2015-06-24 00:39:16]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2015-06-24 00:40:15]

Patchset 4 (id:??) landed as
https://crrev.com/b3413064f36bf166d7dffb463bc442059dab1dd7
Cr-Commit-Position: refs/heads/master@{#335827}