Removing usages of a deleted flag.

Deleted in https://chromium.googlesource.com/chromium/src.git/+/ba49d00fddeb39c0816090dad7d359df0dce9a1a
Bug: 74848

Change-Id: Ia3d5c796ad34857f4e84fdb3a6f53fce3f00d63b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1574829Reviewed-by: Egor Pasko <pasko@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Anthony Steinhauser <asteinhauser@google.com>
Cr-Commit-Position: refs/heads/master@{#652638}

ppapi/native_client/tools/browser_tester/browsertester/browserlauncher.py

@@ -279,7 +279,6 @@ class ChromeLauncher(BrowserLauncher):
             '--no-first-run',
             '--no-default-browser-check',
             '--log-level=1',
-            '--safebrowsing-disable-auto-update',
             '--disable-default-apps',
             # Suppress metrics reporting.  This prevents misconfigured bots,
             # people testing at their desktop, etc from poisoning the UMA data.

tools/android/customtabs_benchmark/scripts/chrome_setup.py

@@ -12,8 +12,6 @@ CHROME_ARGS = [
     '--disable-background-networking',
     '--disable-default-apps',
     '--no-proxy-server',
-    # TODO(droger): Remove once crbug.com/354743 is fixed.
-    '--safebrowsing-disable-auto-update',
 
     # Disables actions that chrome performs only on first run or each launches,
     # which can interfere with page load performance, or even block its