Fix another instance of potentially dangling ":" in LD_LIBRARY_PATH.

chrome/tools/build/linux/chrome-wrapper

 #!/bin/sh
 
 # Copyright (c) 2010 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.
 
 # Running Chromium via this script makes it possible to set Chromium as the
 # default browser directly out of a compile, without needing to package it.
 
 DESKTOP="chromium-devel"
@@ skipping 63 matching lines @@
   *:$HERE:*)
     # $PATH already contains $HERE, leave it where it is.
     ;;
   *)
     # Prepend $HERE to $PATH.
     export PATH="$HERE:$PATH"
     ;;
 esac
 
 # Always use our ffmpeg and other shared libs.
-export LD_LIBRARY_PATH="$HERE:$HERE/lib:$HERE/lib.target:$LD_LIBRARY_PATH"
+if [[ -n "$LD_LIBRARY_PATH" ]]; then
+  LD_LIBRARY_PATH="$HERE:$HERE/lib:$HERE/lib.target:$LD_LIBRARY_PATH"
+else
+  LD_LIBRARY_PATH="$HERE:$HERE/lib:$HERE/lib.target"
+fi
+export LD_LIBRARY_PATH
+
 
 MISSING_LIBS=$(ldd "$HERE/chrome" 2> /dev/null |grep "not found$" | cut -d" " -f 1|sed 's/\t//')
 CHROME_ARCH=$(check_executable "$HERE/chrome")
 uname -m | grep -qs x86_64
 if [ $? = 1 ]; then
     LIBDIRS="/lib /lib32 /usr/lib /usr/lib32"
 else
     LIBDIRS="/lib64 /lib /usr/lib64 /usr/lib"
 fi
 
@@ skipping 29 matching lines @@
     fi
 done
 
 # Custom version string for this release. This can be used to add a downstream
 # vendor string or release channel information.
 export CHROME_VERSION_EXTRA="custom"
 
 exists_desktop_file || generate_desktop_file
 
 exec "$HERE/chrome" "$@"