Reenable disabled test.

BUG=336343
TBR=glider@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/146043006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246753 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246753
Allow Extension-specific toggling for error reporting

Allow error reporting to be toggled on or off for specific extensions.
Allow type-specific enabling for extension errors (e.g., enabling only manifest or runtime errors).
Create an ErrorMap object for error storage management.

BUG=21734
TBR=finnur@chromium.org (c/b/ui/webui/extensions)

Review URL: https://codereview.chromium.org/58903008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246756 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246756