Add enterprise policy to allow locally issued SHA-1 certificates.

components/policy/resources/policy_templates.json

 {
 # policy_templates.json - Metafile for policy templates
 #
 # The content of this file is evaluated as a Python expression.
 #
 # This file is used as input to generate the following policy templates:
 # ADM, ADMX+ADML, MCX/plist and html documentation.
 #
 # Policy templates are user interface definitions or documents about the
 # policies that can be used to configure Chrome. Each policy is a name-value
@@ skipping 119 matching lines @@
 #   templates and documentation. The policy definition list that Chrome sees
 #   will include policies marked with 'future'. If a WIP policy isn't meant to
 #   be seen by the policy providers either, the 'supported_on' key should be set
 #   to an empty list.
 #
 # IDs:
 #   Since a Protocol Buffer definition is generated from this file, unique and
 #   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: 339
+#   For your editing convenience: highest ID currently used: 340
 #
 # Placeholders:
 #   The following placeholder strings are automatically substituted:
 #     $1 -> Google Chrome / Chromium
 #     $2 -> Google Chrome OS / Chromium OS
 #     $3 -> Google Chrome Frame / Chromium Frame
 #     $6 is reserved for doc_writer
 #
 # Device Policy:
 #   An additional flag 'device_only' (optional, defaults to False) indicates
@@ skipping 4459 matching lines @@
       'id': 235,
       'caption': '''Whether online OCSP/CRL checks are required for local trust anchors''',
       'tags': [],
       'desc': '''When this setting is enabled, <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> will always perform revocation checking for server certificates that successfully validate and are signed by locally-installed CA certificates.
 
       If <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> is unable to obtain revocation status information, such certificates will be treated as revoked ('hard-fail').
 
       If this policy is not set, or it is set to false, then <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> will use the existing online revocation checking settings.''',
     },
     {
+      'name': 'EnableSha1ForLocalAnchors',
+      'type': 'main',
+      'schema': { 'type': 'boolean' },
+      'supported_on': ['chrome.*:54-', 'chrome_os:54-', 'android:54-'],
+      'features': {
+        'dynamic_refresh': True,
+        'per_profile': False,
+      },
+      'example_value': False,
+      'id': 340,
+      'caption': '''Whether SHA-1 signed certificates issued by local trust anchors are allowed''',
+      'tags': ['system-security'],
+      'desc': '''When this setting is enabled, <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> will allow SHA-1 signed certificates as long as they successfully validate and chain to a locally-installed CA certificates.

[Thiemo Nagel, 2016/08/12 13:12:44]

Style nit: I'd suggest to use present tense.

[mattm, 2016/08/12 20:48:14]

Done.

+
+      Note that this policy depends on the operating system certificate verification stack allowing SHA-1 signatures. If an OS update changes the OS handling of SHA-1 certificates, this policy may no longer have effect.  Further, this policy is intended as a temporary workaround to give enterprises more time to move away from SHA-1.  This policy will be removed on or around January 1st 2019.
+
+      If this policy is not set, or it is set to false, then <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> will follow the publicly announced SHA-1 deprecation schedule.''',

[Thiemo Nagel, 2016/08/12 13:12:45]

Same here, suggest to use present tense.

[mattm, 2016/08/12 20:48:14]

Done.

+    },
+    {
       'name': 'ForceEphemeralProfiles',
       'type': 'main',
       'schema': { 'type': 'boolean' },
       'supported_on': ['chrome.*:32-'],
       'features': {
         'dynamic_refresh': False,
         'per_profile': True,
       },
       'example_value': True,
       'id': 245,
@@ skipping 4304 matching lines @@
       'desc': '''Text appended in parentheses next to the policies top-level container to indicate that those policies are of the Recommended level''',
       'text': 'Default Settings (users can override)',
     },
     'doc_complex_policies_on_windows': {
       'desc': '''Text pointing the user to a help article for complex policies on Windows''',
       'text': '''encoded as a JSON string, for details see <ph name="COMPLEX_POLICIES_URL">https://www.chromium.org/administrators/complex-policies-on-windows<ex>https://www.chromium.org/administrators/complex-policies-on-windows</ex></ph>''',
     },
   },
   'placeholders': [],
 }