We can use nsBlockFrame to render summary elements.
This change undoes "Bug 591737 - Add SummaryFrame" and remove
summaryFrame usage in DetailsFrame and nsCSSFrameConstructor.
MozReview-Commit-ID: 4aJvHVPfsBb
--HG--
extra : rebase_source : 8e197fa61cfcbaf066a8a510aef7c92adddd30f2
If the main summary element has 'display: none' style, it won't
generates a summary frame as the first child of the details.
However, if a details element have two summaries and the first summary
has 'display: none', the second summary still generates a SummaryFrame
event if it isn't the main summary. So instead of checking on the
SummaryFrame as before, I check the content tree for the main summary by
using the idea in bug 1245424 comment 8. Another reason might be the
potential removal of SummaryFrame in bug 1258657.
MozReview-Commit-ID: H0evZ17zj5k
--HG--
extra : rebase_source : 1aad3ad1d31dc277771013f92eace5cefa7d6112
If a <details> lacks a direct <summary> child, we need to construct a
default one.
--HG--
extra : commitid : ApnP20Mrr33
extra : rebase_source : 4b059f4e7fa32bac665487aa8a266ba58597b184
