1244238 - nsCOMArray Length() accessor should now return size_t (to match nsTArray change)

Status: NEW

(Core :: XPCOM, defect)

Description

[Daniel Holbert [:dholbert]]

nsCOMArray has the following accessor, added in bug 493711:
> 108   // nsTArray-compatible version
> 109   uint32_t Length() const { return mArray.Length(); }

When this was added, nsTArray's own Length() accessor did indeed return uint32_t. However, that changed here in bug 1004098:
http://hg.mozilla.org/mozilla-central/diff/b347f6eb2239/xpcom/glue/nsTArray.h#l1.63

We should update nsCOMArray to keep it this "nsTArray-compatible" function in sync.

(Possibly other accessors & usages of these nsCOMArray APIs need to change as well...)