Revert 149409 - Roll Syzygy release to r1027

DEPS

 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 
 vars = {
   # Use this googlecode_url variable only if there is an internal mirror for it.
   # If you do not know, use the full path while defining your new deps entry.
   "googlecode_url": "http://%s.googlecode.com/svn",
   "sourceforge_url": "http://%(repo)s.svn.sourceforge.net/svnroot/%(repo)s",
   "webkit_trunk": "http://svn.webkit.org/repository/webkit/trunk",
   "nacl_trunk": "http://src.chromium.org/native_client/trunk",
@@ skipping 350 matching lines @@
       (Var("nacl_trunk") + "/deps/third_party/mingw-w64/mingw/bin@" +
        Var("nacl_tools_revision")),
 
     # Dependencies used by libjpeg-turbo
     "src/third_party/yasm/binaries":
       "/trunk/deps/third_party/yasm/binaries@74228",
 
     # Binary level profile guided optimizations. This points to the
     # latest release binaries for the toolchain.
     "src/third_party/syzygy/binaries":
-      (Var("googlecode_url") % "sawbuck") + "/trunk/syzygy/binaries@1027",
+      (Var("googlecode_url") % "sawbuck") + "/trunk/syzygy/binaries@991",
 
     # Binaries for nacl sdk.
     "src/third_party/nacl_sdk_binaries":
       "/trunk/deps/third_party/nacl_sdk_binaries@111576",
   },
   "ios": {
     "src/third_party/GTM":
       (Var("googlecode_url") % "google-toolbox-for-mac") + "/trunk@" +
       Var("gtm_revision"),
 
@@ skipping 209 matching lines @@
     "pattern": ".",
     "action": ["python", "src/build/util/lastchange.py",
                "-o", "src/build/util/LASTCHANGE"],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]