Many moz.build files define things that could be defined in parent
moz.build files. Keeping the number of moz.build files low helps with
build times due to less I/O and fewer directories traversed.
This patch eliminates a lot of moz.build files by moving their content
into parent moz.build files.
--HG--
extra : rebase_source : 0cfdf2697d10532e5b03cd27fbaadb41f42b837c
extra : amend_source : 0119d4e4881217f105e0e4ba1dfa9c8f7295f3e9
extra : histedit_source : eb49e62c67af2005fdc08d9c9a07f56bee98d558%2C50951e960e450f9b0e48fc7e8ec369d8666a63b0
Attempt to sniff raw mp3 with no id3 tag by looking for a header
followed by a second header at the expected offset from the packet
length.
Adds mp3 sniffing with and without id3 tags to the mediasniffer
xpcshell tests. These files are truncated to 512 bytes. Our method
can require up to 1.5k of data, but these have 208/209 byte packets
so sniffing still works.
notags-bad.mp3 has a corrupt header, and verifies sniffing fails.
notags-scan.mp3 has garbage before the header, and verifies sniffing fails.
he_free.mp is a vbr test vector which isn't sniffable with this method.
fl10.mp2 is an mp2 file, and verifies sniffing fails.
ff-inst.exe verifies bug 875769 doesn't regress.
