Fix gendered string descriptions and comments in //components.

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 8056 matching lines @@
       'schema': { 'type': 'boolean' },
       'supported_on': ['chrome.*:55-'],
       'features': {
         'dynamic_refresh': False,
         'per_profile': False,
       },
       'example_value': False,
       'id': 346,
       'caption': '''Enables force sign in for <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph>.''',
       'tags': [],
-      'desc': '''If this policy is set to true, user has to sign in to <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> with his or her profile before using the browser. And the default value of BrowserGuestModeEnabled will be set to false.
+      'desc': '''If this policy is set to true, user has to sign in to <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> with their profile before using the browser. And the default value of BrowserGuestModeEnabled will be set to false.
 
       If this policy is set to false or not configured, user can use the browser without sign in to <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph>.''',
     },
     {
       'name': 'SSLVersionMin',
       'type': 'string-enum',
       'schema': {
         'type': 'string',
         'enum': [
           'ssl3',
@@ skipping 1312 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': [],
 }