Prune infobar-related LeakSanitizer suppressions.

BUG=62154
TBR=pkasting@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/101293003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238375 0039d316-1c4b-4281-b951-d872f2087c98
Stop setting invalid value to the |tab_id| field of fileBrowserHandler API.

Since the very long long ago when we have moved file manager out of tabs
to a separate app window, it didn't have any tab_id associated,
and the existing code always assigned an invalid value (-1).

This CL removes the useless code. Since the field is defined to
be optional, it doesn't change the interface of the API.

BUG=312519

Review URL: https://codereview.chromium.org/101323002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238376 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238376