ChromeOS: Implement CaptivePortalAuthenticationIgnoresProxy policy.

components/policy/resources/policy_templates.json

Index: components/policy/resources/policy_templates.json
diff --git a/components/policy/resources/policy_templates.json b/components/policy/resources/policy_templates.json
index 7f159c7c76b6f9208b47f88e76661cbb0e787d9a..3081b6fbe4b316643cd90fc61fab84d45314d0b5 100644
--- a/components/policy/resources/policy_templates.json
+++ b/components/policy/resources/policy_templates.json
@@ -123,7 +123,7 @@
 #   persistent IDs for all fields (but not for groups!) are needed. These are
 #   specified by the 'id' keys of each policy. NEVER CHANGE EXISTING IDs,
 #   because doing so would break the deployed wire format!
-#   For your editing convenience: highest ID currently used: 284
+#   For your editing convenience: highest ID currently used: 285
 #
 # Placeholders:
 #   The following placeholder strings are automatically substituted:
@@ -1245,6 +1245,28 @@
       'label': '''Clear site data on browser shutdown (deprecated)''',
     },
     {
+      'name': 'CaptivePortalAuthenticationIgnoresProxy',
+      'type': 'main',
+      'schema': { 'type': 'boolean' },
+      'supported_on': ['chrome_os:41-'],
+      'features': {
+        'can_be_recommended': False,
+        'dynamic_refresh': True,
+        'per_profile': True,
+      },
+      'example_value': True,
+      'default_for_enterprise_users': False,
+      'id': 285,
+      'caption': '''Captive portal authentication ignores proxy''',
+      'desc': '''<ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> will bypass any proxy for Captive Portal authentication.

[bartfab (slow), 2015/01/07 17:38:43]

Nit 1: This unconditional sentence makes it sound like Chrome will always bypass
the proxy. It would rather say that this policy controls whether Chrome bypasses
the proxy or not.
Nit 2: You should use the placeholder for Google Chrome OS here, not the one for
Google Chrome.

[Alexander Alekseev, 2015/01/12 18:41:10]

Done.

+
+      This policy only takes effect if proxy is configured (either through policy, or by the user in chrome://settings).

[bartfab (slow), 2015/01/07 17:38:43]

Nit 1: s/proxy/a proxy/
Nit 2: What about proxies configured by extensions?

[Alexander Alekseev, 2015/01/12 18:41:10]

Done.

+
+      If you enable this setting, any captive portal authentication pages will be displayed in a separate window ignoring all proxy settings.
+
+      If you disable this setting or leave it unset, any captive portal authentication pages will be shown in a (regular) new browser tab.''',

[bartfab (slow), 2015/01/07 17:38:43]

Nit: You may want to add something like ", using the current user's proxy."

[Alexander Alekseev, 2015/01/12 18:41:10]

Done.

+    },
+    {
       'name': 'Proxy',
       'type': 'group',
       'caption': '''Proxy server''',