Linux: Add a check to the startup script to check for SSE2 support.

chrome/installer/linux/common/wrapper

 #!/bin/bash
 #
 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Let the wrapped binary know that it has been run through the wrapper.
 export CHROME_WRAPPER="`readlink -f "$0"`"
 
 HERE="`dirname "$CHROME_WRAPPER"`"
 
+# Check if the CPU supports SSE2. If not, try to pop up a dialog to explain the
+# problem and exit. Otherwise the browser will just crash with a SIGILL.
+# http://crbug.com/348761
+grep ^flags /proc/cpuinfo|grep -qs sse2
+if [ $? != 0 ]; then
+  SSE2_DEPRECATION_MSG="This computer can no longer run Google Chrome because \
+its hardware is no longer supported."
+  if which zenity &> /dev/null; then
+    zenity --warning --text="$SSE2_DEPRECATION_MSG"
+  elif which gmessage &> /dev/null; then
+    gmessage "$SSE2_DEPRECATION_MSG"
+  elif which xmessage &> /dev/null; then
+    xmessage "$SSE2_DEPRECATION_MSG"
+  else
+    echo "$SSE2_DEPRECATION_MSG" 1>&2
+  fi
+  exit 1
+fi
+
 # We include some xdg utilities next to the binary, and we want to prefer them
 # over the system versions when we know the system versions are very old. We
 # detect whether the system xdg utilities are sufficiently new to be likely to
 # work for us by looking for xdg-settings. If we find it, we leave $PATH alone,
 # so that the system xdg utilities (including any distro patches) will be used.
 if ! which xdg-settings &> /dev/null; then
   # Old xdg utilities. Prepend $HERE to $PATH to use ours instead.
   export PATH="$HERE:$PATH"
 else
   # Use system xdg utilities. But first create mimeapps.list if it doesn't
@@ skipping 28 matching lines @@
 
 # Make sure that the profile directory specified in the environment, if any,
 # overrides the default.
 if [[ -n "$CHROME_USER_DATA_DIR" ]]; then
   PROFILE_DIRECTORY_FLAG="--user-data-dir=$CHROME_USER_DATA_DIR"
 fi
 
 # Note: exec -a below is a bashism.
 exec -a "$0" "$HERE/@@PROGNAME@@" @@DEFAULT_FLAGS@@ "$PROFILE_DIRECTORY_FLAG" \
   "$@"