Add move constructors and assignment operators to GURL

Add move constructors and assignment operators to GURL

This CL implements a cheap move constructor and assignment operator for
GURL, so that code that moves around GURLs a lot (e.g. an
std::vector<GURL>) doesn't need to perform so many copies.

BUG=698978
Review-Url: https://codereview.chromium.org/2737693003
Cr-Commit-Position: refs/heads/master@{#456828}
Committed: https://chromium.googlesource.com/chromium/src/+/376085b3685d5cd6195909462036343d11fca018

[sclittle, 2017-03-07 03:41:24]

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

[brettw, 2017-03-14 19:38:24]

I thought we already had these!

LGTM

[sclittle, 2017-03-14 19:43:03]

The CQ bit was checked by sclittle@chromium.org

[commit-bot: I haz the power, 2017-03-14 19:43:31]

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, 2017-03-14 21:08:47]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1489520583817330, "parent_rev":
"84583c03bdaa1f2070997c4e1a17f4c97639bcec", "commit_rev":
"376085b3685d5cd6195909462036343d11fca018"}

[commit-bot: I haz the power, 2017-03-14 21:09:24]

Description was changed from

==========
Add move constructors and assignment operators to GURL

This CL implements a cheap move constructor and assignment operator for
GURL, so that code that moves around GURLs a lot (e.g. an
std::vector<GURL>) doesn't need to perform so many copies.

BUG=698978
==========

to

==========
Add move constructors and assignment operators to GURL

This CL implements a cheap move constructor and assignment operator for
GURL, so that code that moves around GURLs a lot (e.g. an
std::vector<GURL>) doesn't need to perform so many copies.

BUG=698978

Review-Url: https://codereview.chromium.org/2737693003
Cr-Commit-Position: refs/heads/master@{#456828}
Committed:
https://chromium.googlesource.com/chromium/src/+/376085b3685d5cd6195909462036...
==========

[commit-bot: I haz the power, 2017-03-14 21:09:31]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/376085b3685d5cd6195909462036...