Add a SafeSearch preference, policy and implementation.

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 94 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: 161
+#   For your editing convenience: highest ID currently used: 162
 #
 # 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 424 matching lines @@
       'caption': '''Enable <ph name="CLOUD_PRINT_NAME">Google Cloud Print</ph> proxy''',
       'desc': '''Enables <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> to act as a proxy between <ph name="CLOUD_PRINT_NAME">Google Cloud Print</ph> and legacy printers connected to the machine.
 
       If this setting is enabled or not configured, users can enable the cloud print proxy by authentication with their Google account.
 
       If this setting is disabled, users cannot enable the proxy, and the machine will not be allowed to share it's printers with <ph name="CLOUD_PRINT_NAME">Google Cloud Print</ph>.
 
       If this policy is left not set, this will be enabled but the user will be able to change it.''',
     },
     {
+      'name': 'ForceSafeSearch',
+      'type': 'main',
+      'schema': { 'type': 'boolean' },
+      'supported_on': ['chrome.*:24-', 'chrome_os:0.24-'],
+      'features': {
+        'dynamic_refresh': True,
+        'can_be_recommended': False,
+      },
+      'example_value': False,
+      'id': 162,
+      'caption': '''Force SafeSearch''',
+      'desc': '''Forces queries in Google Web Search to be done with SafeSearch set to active and prevents users from changing this setting.
+
+      If you enable this setting, SafeSearch in Google Search is always active.
+
+      If you disable this setting, SafeSearch in Google Search is not enforced.''',
+    },
+    {
       'name': 'SafeBrowsingEnabled',
       'type': 'main',
       'schema': { 'type': 'boolean' },
       'supported_on': ['chrome.*:8-', 'chrome_os:0.11-'],
       'features': {
         'dynamic_refresh': True,
         'can_be_recommended': True,
       },
       'example_value': True,
       'id': 14,
@@ skipping 2774 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': 'Recommended',
     },
   },
   'placeholders': [],
 }