Add chrome_proxy.exe target on Windows

This change adds a new executable to Windows called chrome_proxy.exe which
opens chrome.exe with all arguments forwarded.

In a future patch bookmark app shortcuts will be updated to point to
chrome_proxy.exe instead of chrome.exe so they don't pick up the
chrome.VisualElementsManifest.xml file when pinned to the Windows 10
start menu. This fixes a bug where pinned bookmark app shortcuts all
use the Chrome logo instead of their own.

This is a reland of https://chromium-review.googlesource.com/c/chromium/src/+/1362695
with the rename logic to account for chrome_proxy.exe not existing.
Diff: https://chromium-review.googlesource.com/c/chromium/src/+/1367385/1..2

Bug: 732357
Change-Id: If670aaec69532aa7f2d8094470aabac716aa8035
Reviewed-on: https://chromium-review.googlesource.com/c/1367385
Commit-Queue: Alan Cutter <alancutter@chromium.org>
Reviewed-by: Greg Thompson <grt@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#615824}
23 files changed