[Quota] Refine usage handling in ClientUsageTracker.

[Quota] Refine usage handling in ClientUsageTracker.

This CL split global_usage_ into global_limited_usage_
 and global_unlimited_usage_ to prepare for adding GetGlobalLimitedUsage.

BUG=220029
TEST=no functional change, should not break existing tests

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=202454

[tzik, 2013-05-27 11:37:36]

PTL

[kinuko, 2013-05-27 11:54:24]

lgtm

https://codereview.chromium.org/16067003/diff/2001/webkit/quota/usage_tracker.cc
File webkit/quota/usage_tracker.cc (right):

https://codereview.chromium.org/16067003/diff/2001/webkit/quota/usage_tracker...
webkit/quota/usage_tracker.cc:475: usage = new_usage;
Feels slightly uneasy to use mutable ref...

[tzik, 2013-05-27 15:13:21]

https://codereview.chromium.org/16067003/diff/2001/webkit/quota/usage_tracker.cc
File webkit/quota/usage_tracker.cc (right):

https://codereview.chromium.org/16067003/diff/2001/webkit/quota/usage_tracker...
webkit/quota/usage_tracker.cc:475: usage = new_usage;
On 2013/05/27 11:54:24, kinuko wrote:
> Feels slightly uneasy to use mutable ref...

Do you feel easier if I change this to a pointer?

[kinuko, 2013-05-27 15:27:32]

https://codereview.chromium.org/16067003/diff/2001/webkit/quota/usage_tracker.cc
File webkit/quota/usage_tracker.cc (right):

https://codereview.chromium.org/16067003/diff/2001/webkit/quota/usage_tracker...
webkit/quota/usage_tracker.cc:475: usage = new_usage;
On 2013/05/27 15:13:21, tzik wrote:
> On 2013/05/27 11:54:24, kinuko wrote:
> > Feels slightly uneasy to use mutable ref...
> 
> Do you feel easier if I change this to a pointer?

Ah, I like it better.

[commit-bot: I haz the power, 2013-05-27 17:27:18]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tzik@chromium.org/16067003/8003

[commit-bot: I haz the power, 2013-05-27 18:43:29]

Change committed as 202454