Add delay loading of dbghelp.dll into essential.vsprops. We need some functions from dbghelp.dll to implement backtrace logic in base/debug_util_win.cc.  This change will stage things so adding the new function calls won't break everyone.  The delay load is in essential.vsprops because everyone will need it in order to link base after the backtrace code is added.
Add delay loading of dbghelp.dll into essential.vsprops.
We need some functions from dbghelp.dll to implement backtrace logic in base/debug_util_win.cc.  This change will stage things so adding the new function calls won't break everyone.  The delay load is in essential.vsprops because everyone will need it in order to link base after the backtrace code is added.

Review URL: http://codereview.chromium.org/67137

git-svn-id: http://src.chromium.org/svn/trunk/src@13818 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 7ead63dbe9f6e253934e6eab30f55bc7b0fd03b5
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser