Revert "add missing "void" return type from cache_invalidate()"

This reverts commit 66e651d7cd6cd8ab0af037cafc0caded84f953b0

Change-Id: Ic8c9a0c082907c448a9a7df1bc0077e1ffc566b7
See: https://code.google.com/p/chromium/issues/detail?id=240284
Reviewed-on: https://gerrit.chromium.org/gerrit/51052
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
1 file changed