Summary:Adding a command line flag to open URLs in active tab

The user can now add a flag "--same-tab" to open URLs in active tabs
now. The desired command would look something like this:

./usr/bin/google-chrome --same-tab "https://google.com"
OR
./out/Default/chrome --same-tab "https://google.com"

In case multiple URLs are entered as inputs then the first one from the
inputs replaces the active tab while all the others are opened in new
tabs as expected.

Bug: 41283963
Change-Id: Ifbbaacfd7a1c635ab048e79dcb7b89661971f62e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6109882
Commit-Queue: Yann Dago <ydago@chromium.org>
Reviewed-by: Tommy Martino <tmartino@chromium.org>
Reviewed-by: Yann Dago <ydago@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1429265}

• AUTHORS[diff]
• chrome/browser/ui/startup/startup_browser_creator.h[diff]
• chrome/browser/ui/startup/startup_browser_creator_browsertest.cc[diff]
• chrome/browser/ui/startup/startup_browser_creator_impl.cc[diff]
• chrome/browser/ui/startup/startup_browser_creator_impl.h[diff]
• chrome/common/chrome_switches.cc[diff]
• chrome/common/chrome_switches.h[diff]