I'm looking at this !

For the record, I told sebmarchand this about "First Run": "i believe this file was created as part of the build process so that developers running out\Rel\chrome.exe to test out their feature under development wouldn't have to go through first-run. I think it's desirable to keep this behavior so as to not surprise developers."

There's at least 2 issues here:
- The GN rule to copy chrome/app/firstRun is missing (equivalent of https://cs.chromium.org/chromium/src/chrome/chrome_exe.gypi?q=%22First+run%22&sq=package:chromium&dr=C&l=462), I'll add it.
- The GN 64 bit build has no dependency on courgette.exe but it's listed in the list of files that need to be archived here https://cs.chromium.org/chromium/src/chrome/tools/build/win/FILES.cfg?q=FILES.cf&sq=package:chromium&l=553 , I think that we don't need this anymore so the right fix is probably just to remove this from FILES.cfg ? (at least for the 32 bit build)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f2a3e3abd589b619860f8a2ac181e78ca91bd1ec

commit f2a3e3abd589b619860f8a2ac181e78ca91bd1ec
Author: sebmarchand <sebmarchand@chromium.org>
Date: Tue Jul 19 01:53:18 2016

Fix the Win64 GN installer config

- Add the copy_first_run target (equivalent of https://cs.chromium.org/chromium/src/chrome/chrome_exe.gypi?q=%22First+run%22&sq=package:chromium&dr=C&l=462)
- Remove courgette.exe from the official Win64 archives as we're using courgette64.exe

BUG= 628056 

Review-Url: https://codereview.chromium.org/2152333002
Cr-Commit-Position: refs/heads/master@{#406173}

[modify] https://crrev.com/f2a3e3abd589b619860f8a2ac181e78ca91bd1ec/chrome/BUILD.gn
[modify] https://crrev.com/f2a3e3abd589b619860f8a2ac181e78ca91bd1ec/courgette/BUILD.gn

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/17502ed46616115c1586a0c99375c9be93441c70

commit 17502ed46616115c1586a0c99375c9be93441c70
Author: sebmarchand <sebmarchand@chromium.org>
Date: Wed Jul 20 22:33:54 2016

Fix the definition of the syzygy_optimize variable in GN

Remove the 'symbol_level==2' condition as we can assume than an official build (without fast link) will have symbols.

R=dpranke@chromium.org
BUG= 628056 

Review-Url: https://codereview.chromium.org/2167793002
Cr-Commit-Position: refs/heads/master@{#406698}

[modify] https://crrev.com/17502ed46616115c1586a0c99375c9be93441c70/build/config/compiler/compiler.gni

Things look to work now.