Make password generation switched by a preference in chrome settings rather than a command line fla…

chrome/browser/resources/options2/browser_options.html

Index: chrome/browser/resources/options2/browser_options.html
diff --git a/chrome/browser/resources/options2/browser_options.html b/chrome/browser/resources/options2/browser_options.html
index ad3cede1b95beb872b534828bfefc10228273830..bf1301d3a28bc872f91ef14cd5687109bd4dcce4 100644
--- a/chrome/browser/resources/options2/browser_options.html
+++ b/chrome/browser/resources/options2/browser_options.html
@@ -311,6 +311,13 @@
           i18n-content="managePasswords"
           pref="profile.password_manager_enabled"></button>
     </div>
+    <div class="checkbox" id="password-generation-checkbox">
+      <label>
+        <input id="password-generation-enabled" pref="password_generation.enabled"
+            metric="Options_PasswordGenerationCheckbox" type="checkbox">
+        <span i18n-content="passwordGenerationEnabledDescription"></span>
+      </label>
+    </div>
 <if expr="is_macosx">
     <div id="mac-passwords-warning" i18n-content="macPasswordsWarning" hidden>
     </div>