Adds WTF::debug::ScopedCrashKey as an alias of base::debug::ScopedCrashKey.

Adds WTF::debug::ScopedCrashKey as an alias of base::debug::ScopedCrashKey.

Allows Blink to use base::debug::ScopedCrashKey.

BUG=621730
Committed: https://crrev.com/28dd2edf07c976d50601e5690dd24485f38c1ed6
Cr-Commit-Position: refs/heads/master@{#402602}

[Yuki, 2016-06-28 12:22:34]

yukishiino@chromium.org changed reviewers:
+ dcheng@chromium.org, haraken@chromium.org

[Yuki, 2016-06-28 12:22:34]

Just in case, I made a separate CL that only introduce
WTF::debug::ScopedCrashKey, so that we don't need to revert ScopedCrashKey when
we revert https://crrev.com/2101283002 .

[haraken, 2016-06-28 14:54:37]

LGTM

I'm not sure if we want to create a directory for one file, but if you plan to
move other debug-related files (e.g., Assertions.h), looks good.

[dcheng, 2016-06-28 15:26:11]

//base DEP LGTM

[Yuki, 2016-06-28 23:06:20]

The CQ bit was checked by yukishiino@chromium.org

[commit-bot: I haz the power, 2016-06-28 23:08:10]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-06-28 23:53:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-28 23:55:17]

Description was changed from

==========
Adds WTF::debug::ScopedCrashKey as an alias of base::debug::ScopedCrashKey.

Allows Blink to use base::debug::ScopedCrashKey.

BUG=621730
==========

to

==========
Adds WTF::debug::ScopedCrashKey as an alias of base::debug::ScopedCrashKey.

Allows Blink to use base::debug::ScopedCrashKey.

BUG=621730

Committed: https://crrev.com/28dd2edf07c976d50601e5690dd24485f38c1ed6
Cr-Commit-Position: refs/heads/master@{#402602}
==========

[commit-bot: I haz the power, 2016-06-28 23:55:18]

Patchset 1 (id:??) landed as
https://crrev.com/28dd2edf07c976d50601e5690dd24485f38c1ed6
Cr-Commit-Position: refs/heads/master@{#402602}