Change custom wallpaper picker button text from custom to browse

TBR=saintlou@chromium.org
BUG=131500
TEST=
Go to wallpaper picker page, verify if the "Custom..." button changed to
"Browse...".

Review URL: https://chromiumcodereview.appspot.com/10538058

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@141225 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/generated_resources.grd

@@ -13489,7 +13489,7 @@ Press any key to continue exploring.
         Stretch
       </message>
       <message name="IDS_OPTIONS_CUSTOME_WALLPAPER" desc="Label for option to choose a customized wallpaper.">
-        Custom...
+        Browse...
       </message>
       <message name="IDS_OPTIONS_CHANGE_PICTURE" desc="In the settings tab, the text on the button to change picture for the current user.">
         Change picture...