Avoid unnecessary rebuilds of installer_util and chrome.dll by only writing out appid.h (and updating its timestamp) if the contents change. BUG=16470 TEST=Use F5 to debug unit_tests Review URL: http://codereview.chromium.org/199001
Avoid unnecessary rebuilds of installer_util and chrome.dll by only
writing out appid.h (and updating its timestamp) if the contents change.
BUG=16470
TEST=Use F5 to debug unit_tests
Review URL: http://codereview.chromium.org/199001

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@25290 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