[Mac] Update location-bar icon as user types.
[Mac] Update location-bar icon as user types.

Update in |OnChanged()|, just like Windows.

NOTE: This CL requires the following change else it breaks the build:
  http://src.chromium.org/viewvc/chrome?view=rev&revision=44775
[Didn't think to put this note on that change, sorry.]

BUG=41362
TEST=Type "www.google.com".  You should have a globe icon.
TEST=Add a space after first 'w'.  Should get search icon.
TEST=Generally, icon will switch around as you type.

Originally committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=44572

Review URL: http://codereview.chromium.org/1640012

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@45500 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser