1. Move IsModuleVersionLessThan into the Compatibility class and export it in the header file.
2. The function previously referred to the third component of the version as the minor version; i.e. it was testing major.bbbb.minor.dddd.
This is incorrect and might confuse people using this in future code.
The minor version is the second component; i.e. major.minor.cccc.dddd.
cccc and dddd are often named build and revision, but the naming here is less consistent.
3. Rather than accepting separate version components, the function now accepts a single 64 bit value.
This makes comparison easier and also allows for comparison against magic values in other code; e.g. a value meaning "all versions".
This value can be created from separate components using the MAKE_FILE_VERSION macro.
4. Previously, it was assumed that a dll path could not be longer than MAX_PATH, but it can actually be longer.
The function now handles this.
5. The function previously didn't do any error checking, which could have led to null pointer dereferences and possibly other pain.
This was fine when it was only being used for JAWS, which we know always has version info, but this could be problematic for other callers.
We return true if there is a failure, assuming that no version info implies an earlier version.
6. The code now uses smart pointers instead of raw pointers, making memory management simpler.
7. Updated the JAWS version check accordingly.
MozReview-Commit-ID: 9Y6gUQSX0P5
--HG--
extra : rebase_source : 595408140d8611d38fef1211ef41c53e4b65e90c
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