MB: Add Win32 ASan bot and remove download of SyzyASan binaries.

DEPS

 # This file contains dependencies for WebRTC.
 
 vars = {
   'chromium_git': 'https://chromium.googlesource.com',
   'chromium_revision': '12dd72e2ea6a81907434ec2192ffc25e85de4db9',
   'boringssl_git': 'https://boringssl.googlesource.com',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
   # and whatever else without interference from each other.
   'swarming_revision': '11e31afa5d330756ff87aa12064bb5d032896cb5',
@@ skipping 470 matching lines @@
     'name': 'luci-go_linux',
     'pattern': '.',
     'action': [ 'download_from_google_storage',
                 '--no_resume',
                 '--platform=linux*',
                 '--no_auth',
                 '--bucket', 'chromium-luci',
                 '-d', 'src/tools/luci-go/linux64',
     ],
   },
-  # Pull the Syzygy binaries, used for optimization and instrumentation.
-  {
-    'name': 'syzygy-binaries',
-    'pattern': '.',
-    'action': ['python',
-               'src/build/get_syzygy_binaries.py',
-               '--output-dir=src/third_party/syzygy/binaries',
-               '--revision=a8456d9248a126881dcfb8707ca7dcdae56e1ac7',
-               '--overwrite',
-    ],
-  },
   {
     # Pull sanitizer-instrumented third-party libraries if requested via
     # GYP_DEFINES.
     # See src/third_party/instrumented_libraries/scripts/download_binaries.py.
     # TODO(kjellander): Update comment when GYP is completely cleaned up.
     'name': 'instrumented_libraries',
     'pattern': '\\.sha1',
     'action': ['python', 'src/third_party/instrumented_libraries/scripts/download_binaries.py'],
   },
   {
@@ skipping 17 matching lines @@
   },
 ]
 
 recursedeps = [
   # buildtools provides clang_format, libc++, and libc++abi.
   'src/buildtools',
   # android_tools manages the NDK.
   'src/third_party/android_tools',
 ]