[tracing] Fix accounting of WebCache memory statistics

[tracing] Fix accounting of WebCache memory statistics

The 'other' field was not added to the memory stats returned by blink
WebCache. This CL fixes this issue, and also adds purged and purgeable
size to the stats. This will be used for memory-infra as a part of
chrome://tracing: see crrev.com/1283793004.

BUG=466141
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=200404

[ssid, 2015-08-11 20:37:33]

ssid@chromium.org changed reviewers:
+ dcheng@chromium.org

[ssid, 2015-08-11 20:37:33]

PTAL. See
https://codereview.chromium.org/1283793004/diff/60001/components/web_cache/re...
for the use case. Thanks

[dcheng, 2015-08-12 00:24:14]

https://codereview.chromium.org/1278403007/diff/1/Source/web/WebCache.cpp
File Source/web/WebCache.cpp (right):

https://codereview.chromium.org/1278403007/diff/1/Source/web/WebCache.cpp#new...
Source/web/WebCache.cpp:48: to.purgedSize =
static_cast<size_t>(from.purgedSize);
How come the core types don't use unsigned or size_t?

[ssid, 2015-08-12 11:21:03]

Thanks PTAL.

https://codereview.chromium.org/1278403007/diff/1/Source/web/WebCache.cpp
File Source/web/WebCache.cpp (right):

https://codereview.chromium.org/1278403007/diff/1/Source/web/WebCache.cpp#new...
Source/web/WebCache.cpp:48: to.purgedSize =
static_cast<size_t>(from.purgedSize);
On 2015/08/12 00:24:14, dcheng wrote:
> How come the core types don't use unsigned or size_t?

True, it should. Changed them now.

[dcheng, 2015-08-12 17:01:11]

lgtm

[ssid, 2015-08-12 17:01:52]

The CQ bit was checked by ssid@chromium.org

[commit-bot: I haz the power, 2015-08-12 17:01:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1278403007/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1278403007/20001

[commit-bot: I haz the power, 2015-08-12 17:08:17]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=200404