Makes the instant url managed by group policy.

chrome/app/policy/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 465 matching lines @@
         {
           'name': 'DefaultSearchProviderSuggestURL',
           'type': 'string',
           'supported_on': ['chrome.*:8-'],
           'annotations': {
             'features': {'dynamic_refresh': 1},
             'example_value': 'http://search.my.company/suggest?q={searchTerms}',
           }
         },
         {
+          'name': 'DefaultSearchProviderInstantURL',
+          'type': 'string',
+          'supported_on': ['chrome.*:10-'],
+          'annotations': {
+            'features': {'dynamic_refresh': 1},
+            'example_value': 'http://search.my.company/suggest?q={searchTerms}',
+          }
+        },
+        {
           'name': 'DefaultSearchProviderIconURL',
           'type': 'string',
           'supported_on': ['chrome.*:8-'],
           'annotations': {
             'features': {'dynamic_refresh': 1},
             'example_value': 'http://search.my.company/favicon.ico',
           }
         },
         {
           'name': 'DefaultSearchProviderEncodings',
@@ skipping 181 matching lines @@
     {
       'key': '$4',
       'value': 'http://www.chromium.org/developers/how-tos/chrome-frame-getting-started'
     },
     {
       'key': '$5',
       'value': 'http://www.chromium.org/administrators/policy-templates'
     },
   ]
 }