Revert 183957

> pkg-config-wrapper shouldn't clobber PKG_CONFIG_PATH if it is already set
> 
> This allows cross-compilation using sysroots with pkgconfig directories in
> non-standard locations.
> 
> Add Opera Software to the AUTHORS file
> 
> 
> BUG=
> 
> 
> Review URL: https://chromiumcodereview.appspot.com/12320047

TBR=mostynb@opera.com
Review URL: https://codereview.chromium.org/12317063

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@184008 0039d316-1c4b-4281-b951-d872f2087c98

AUTHORS

@@ -224,4 +224,3 @@ Sungmann Cho <sungmann.cho@gmail.com>
 Evan Peterson <evan.peterson.ep@gmail.com>
 J. Ryan Stinnett <jryans@chromium.org>
 Matheus Bratfisch <matheusbrat@gmail.com>
-Opera Software ASA <*@opera.com>

build/linux/pkg-config-wrapper

@@ -33,13 +33,7 @@ fi
 rewrite=`dirname $0`/rewrite_dirs.py
 package=${!#}
 
-if [ -z "$PKG_CONFIG_PATH" ]
-then
-  config_path=$root/usr/$libpath/pkgconfig:$root/usr/share/pkgconfig
-else
-  config_path="$PKG_CONFIG_PATH"
-fi
-
+config_path=$root/usr/$libpath/pkgconfig:$root/usr/share/pkgconfig
 set -e
 # Some sysroots, like the Chromium OS ones, may generate paths that are not
 # relative to the sysroot. For example,