DEPS roll plus copy list update.

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",
   "webkit_revision": "127997",
   "chromium_git": "http://git.chromium.org/git",
   "chromiumos_git": "http://git.chromium.org/chromiumos",
   "swig_revision": "69281",
-  "nacl_revision": "9651",
+  "nacl_revision": "9684",
   # After changing nacl_revision, run 'glient sync' and check native_client/DEPS
   # to update other nacl_*_revision's.
   "nacl_tools_revision": "9330",  # native_client/DEPS: tools_rev
   "gtm_revision": "534",
 
   "libjingle_revision": "177",
   "libphonenumber_revision": "456",
   "libvpx_revision": "152423",
   "lss_revision": "11",
 
@@ skipping 549 matching lines @@
 
 hooks = [
   {
     # This downloads binaries for Native Client's newlib toolchain.
     # Done in lieu of building the toolchain from scratch as it can take
     # anywhere from 30 minutes to 4 hours depending on platform to build.
     "pattern": ".",
     "action": [
         "python", "src/build/download_nacl_toolchains.py",
          "--no-arm-trusted",
-         "--optional-pnacl",
          "--save-downloads-dir",
              "src/native_client_sdk/src/build_tools/toolchain_archives",
          "--keep",
     ],
   },
   {
     # Pull clang on mac. If nothing changed, or on non-mac platforms, this takes
     # zero seconds to run. If something changed, it downloads a prebuilt clang,
     # which takes ~20s, but clang speeds up builds by more than 20s.
     "pattern": ".",
@@ skipping 10 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"],
   },
 ]