Roll deps to pick up ffmpeg fix from r42082 and fix a missing file in ffmpeg.gyp.

TBR=fbarchard
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/1133006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@42084 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -2,7 +2,7 @@ vars = {
   "webkit_trunk":
     "http://svn.webkit.org/repository/webkit/trunk",
   "webkit_revision": "56197",
-  "ffmpeg_revision": "42055",
+  "ffmpeg_revision": "42082",
   "skia_revision": "504",
   "chromium_git": "http://src.chromium.org/git",
   "swig_revision": "40423",

third_party/ffmpeg/ffmpeg.gyp

@@ -107,6 +107,7 @@
             'source/patched-ffmpeg-mt/libavcodec/vp3dsp.c',
             'source/patched-ffmpeg-mt/libavcodec/xiph.c',
             'source/patched-ffmpeg-mt/libavformat/allformats.c',
+            'source/patched-ffmpeg-mt/libavformat/avi.c',
             'source/patched-ffmpeg-mt/libavformat/avio.c',
             'source/patched-ffmpeg-mt/libavformat/aviobuf.c',
             'source/patched-ffmpeg-mt/libavformat/cutils.c',