heapcheck: Update suppression for RenderTextLinux->RenderTextPango rename.

BUG=315594
R=zhaoqin@google.com

Review URL: https://codereview.chromium.org/59383016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233275 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233275