Enable accelerated plugins

session_manager_setup.sh

 #!/bin/sh
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Set up to start the X server ASAP, then let the startup run in the
 # background while we set up other stuff.
 XAUTH_FILE="/var/run/chromelogin.auth"
 MCOOKIE=$(head -c 8 /dev/urandom | openssl md5)  # speed this up?
@@ skipping 269 matching lines @@
 # Device Manager Server used to fetch the enterprise policy, if applicable.
 DMSERVER="https://m.google.com/devicemanagement/data/api"
 
 exec /sbin/session_manager --uid=${USER_ID} -- \
     $CHROME --apps-gallery-title="Web Store" \
             --apps-gallery-url="https://chrome.google.com/webstore/" \
             --compress-sys-feedback \
             --device-management-url="$DMSERVER" \
             --disable-domui-menu \
             --disable-seccomp-sandbox \
+            --enable-accelerated-plugins \
             --enable-gview \
             --enable-logging \
             --enable-login-images \
             --enable-tabbed-options \
             --log-level=1 \
             --login-manager \
             --login-profile=user \
             --no-first-run \
             --parallel-auth \
             --scroll-pixels=4 \
             --reload-killed-tabs \
             --user-data-dir="$DATA_DIR" \
             "$REGISTER_PLUGINS" \
             "$TOUCH_DEVICES" \
             ${ACCELERATED_FLAGS} \
             ${SCREENSAVER_FLAG} \
             ${SKIP_OOBE} \
 -- "$WM_SCRIPT"