Implement policy for kNetworkPredictionOptions.

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 102 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: 272
+#   For your editing convenience: highest ID currently used: 273
 #
 # 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 170 matching lines @@
       'caption': '''Enable network prediction''',
       'desc': '''Enables network prediction in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> and prevents users from changing this setting.
 
       This controls not only DNS prefetching but also TCP and SSL preconnection and prerendering of web pages. The policy name refers to DNS prefetching for historical reasons.
 
       If you enable or disable this setting, users cannot change or override this setting in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph>.
 
       If this policy is left not set, this will be enabled but the user will be able to change it.''',
     },
     {
+      'name': 'NetworkPredictionOptions',
+      'type': 'int-enum',
+      'schema': {
+        'type': 'integer',
+        'enum': [ 0, 1, 2 ],
+      },
+      'items': [
+        {
+          'name': 'NetworkPredictionAlways',
+          'value': 0,
+          'caption': '''Predict network actions on any network connection''',
+        },
+        {
+          'name': 'NetworkPredictionWifiOnly',
+          'value': 1,
+          'caption': '''Predict network actions on any network that is not
+          cellular''',
+        },
+        {
+          'name': 'NetworkPredictionNever',
+          'value': 2,
+          'caption': '''Do not predict network actions on any network connection''',
+        },
+      ],
+      'supported_on': ['chrome.*:38-', 'chrome_os:38-', 'android:38-'],
+      'features': {
+        'can_be_recommended': True,
+        'dynamic_refresh': True,
+        'per_profile': True,
+      },
+      'example_value': 1,
+      'id': 273,
+      'caption': '''Enable network prediction''',
+      'desc': '''Enables network prediction in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> and prevents users from changing this setting.
+
+      This controls DNS prefetching, TCP and SSL preconnection and prerendering of web pages.
+
+      If you set this preference to 'always', 'never', or 'WiFi only', users cannot change or override this setting in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph>.
+
+      If this policy is left not set, network prediction will be enabled but the user will be able to change it.''',
+    },
+    {
       'name': 'WPADQuickCheckEnabled',
       'type': 'main',
       'schema': { 'type': 'boolean' },
       'supported_on': [ 'chrome.*:35-', 'chrome_os:35-' ],
       'features': {
         'dynamic_refresh': False,
         'per_profile': False,
       },
       'example_value': True,
       'id': 261,
@@ skipping 6356 matching lines @@
       'desc': '''Text appended in parentheses to the policy name to indicate that it has been deprecated''',
       'text': 'deprecated',
     },
     'doc_recommended': {
       '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)',
     },
   },
   'placeholders': [],
 }