Fix a function definition that was incorrectly marked const

Change-Id: I43b39bca3dbfe0f2b90657753c7d5817a9ff267e
Reviewed-on: https://chromium-review.googlesource.com/950305
Reviewed-by: Patrick Monette <pmonette@chromium.org>
Cr-Commit-Position: refs/branch-heads/3325@{#665}
Cr-Branched-From: bc084a8b5afa3744a74927344e304c02ae54189f-refs/heads/master@{#530369}
diff --git a/chrome/browser/win/settings_app_monitor.cc b/chrome/browser/win/settings_app_monitor.cc
index 68183217..2ca25e27 100644
--- a/chrome/browser/win/settings_app_monitor.cc
+++ b/chrome/browser/win/settings_app_monitor.cc
@@ -791,7 +791,7 @@
 }
 
 void SettingsAppMonitor::Context::MaybeInvokeChooser(
-    IUIAutomationElement* browser_button) const {
+    IUIAutomationElement* browser_button) {
   if (browser_chooser_invoked_ ||
       !base::FeatureList::IsEnabled(
           features::kWin10AcceleratedDefaultBrowserFlow)) {