Add MIPS64 support and remove unused files

DEPS

 # This file is automatically processed to create .DEPS.git which is the file
 # that gclient uses under git.
 #
 # See http://code.google.com/p/chromium/wiki/UsingGit
 #
 # To test manually, run:
 #   python tools/deps2git/deps2git.py -o .DEPS.git -w <gclientdir>
 # where <gcliendir> is the absolute path to the directory containing the
 # .gclient file (the parent of 'src').
 #
@@ skipping 18 matching lines @@
   'webkit_trunk': 'http://src.chromium.org/blink/trunk',
   'nacl_trunk': 'http://src.chromium.org/native_client/trunk',
   'webkit_revision': '9a051c526402aedfa6bc73e6699838c777b679cf', # from svn revision 181337
   'chromium_git': 'https://chromium.googlesource.com',
   'chromiumos_git': 'https://chromium.googlesource.com/chromiumos',
   'pdfium_git': 'https://pdfium.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
   'boringssl_git': 'https://boringssl.googlesource.com',
   # After changing nacl_revision, run 'glient sync' and check native_client/DEPS
   # to update other nacl_*_revision's.
-  'libvpx_revision': '982d14793a8e42d2fa5e6e5e34bede17b4ba67e3', # r291730
+  'libvpx_revision': 'ceebbcc0cef1bbd2bb672576ccf1133168639346', # r291805
   'sfntly_revision': '1bdaae8fc788a5ac8936d68bf24f37d977a13dac',
   'skia_revision': '26abcf10a4994a0bb13a074d79baa85cd8d67b2c',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.
   'v8_branch': 'trunk',
   'v8_revision': '9aaa825cf89e1bcfece269a453300ebf4a26d64d', # from svn revision 23682
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling WebRTC
   # and V8 without interference from each other.
@@ skipping 745 matching lines @@
     # corresponding .py files have already been deleted.
     'name': 'remove_stale_pyc_files',
     'pattern': 'src/tools/.*\\.py',
     'action': [
         'python',
         'src/tools/remove_stale_pyc_files.py',
         'src/tools',
     ],
   },
 ]