IPC: Use <algorithm> helpers for comparing arrays

IPC: Use <algorithm> helpers for comparing arrays

Use std::equal and std::lexicographical_compare for comparing nonce
arrays, rather than manual iteration and comparison.

R=tsepez@chromium.org

Committed: https://crrev.com/cc738251ff93ffcb0cf8e18270fca26e73b8a1df
Cr-Commit-Position: refs/heads/master@{#360115}

[jsbell, 2015-11-16 23:32:47]

I just happened to notice these while looking for places where std::tie could
make operator< implementations more readable. (See https://crbug.com/555171)

I didn't even know about std::lexicographical_compare until a few days ago, but
now I'm a big fan and this seems like a readability win.

[jsbell, 2015-11-16 23:33:06]

Oh, and explicitly: tsepez@ - please take a look?

[Tom Sepez, 2015-11-17 17:29:33]

I like it. None of these are C++11 library features, right? LGTM otherwise.

[jsbell, 2015-11-17 17:30:26]

On 2015/11/17 17:29:33, Tom Sepez wrote:
> I like it. None of these are C++11 library features, right? LGTM otherwise.

Correct. (There are newer overloads of std::equal in C++11 but this one is
"old")

[jsbell, 2015-11-17 17:57:53]

The CQ bit was checked by jsbell@chromium.org

[commit-bot: I haz the power, 2015-11-17 17:58:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1451173002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1451173002/1

[commit-bot: I haz the power, 2015-11-17 18:16:44]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-17 18:17:41]

Patchset 1 (id:??) landed as
https://crrev.com/cc738251ff93ffcb0cf8e18270fca26e73b8a1df
Cr-Commit-Position: refs/heads/master@{#360115}