[GN] Adds const to the comparison operator of the DepsIterator

Currently the comparison operator of the DepsIterator isn't a const method.
It throws a compilation error, when trying to compare two DepsIterators
in a direct way. Also the method doesn't change the iterator state.

Bug: none
Change-Id: Ie10c7b39f174bd30105927038e891713a4e3fb86
Reviewed-on: https://chromium-review.googlesource.com/668445
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#502303}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: a5c648fab64f209abc587d9c4cf1e3becc8d8c2a
1 file changed
tree: e848bc85672a7585c683ea53f264562673f294b8
  1. tools/