[WK2] Refine WebKit2 BatteryStatus code

[Jinwoo Song]

Refinements
 - Return PassRef instead of PassRefPtr in create methods
 - Use auto instead of iterator

[Jinwoo Song]

Created attachment 227405 [details]
Patch

[Anders Carlsson]

Comment on attachment 227405 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=227405&action=review

> Source/WebKit2/WebProcess/Battery/WebBatteryManager.cpp:80
> +    for (auto it = m_pageSet.begin(), end = m_pageSet.end(); it != end; ++it) {

This can just use the range for syntax, 

for (auto* page : m_pageSet)

> Source/WebKit2/WebProcess/Battery/WebBatteryManager.cpp:91
> +    for (auto it = m_pageSet.begin(), end = m_pageSet.end(); it != end; ++it) {

Ditto.

[Jinwoo Song]

Created attachment 227621 [details]
Patch

Applied Andersca's comments.

[WebKit Commit Bot]

Comment on attachment 227621 [details]
Patch

Clearing flags on attachment: 227621

Committed r166148: <http://trac.webkit.org/changeset/166148>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.