Revert 63011 - Convert a lot of DCHECK()s to DCHECK_EQ() and similar, so that when they fail they print the values in question.
Revert 63011 - Convert a lot of DCHECK()s to DCHECK_EQ() and similar, so that when they fail they print the values in question.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/3828013

TBR=pkasting@chromium.org, jamesr@chromium.org
Review URL: http://codereview.chromium.org/3854004

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@63012 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