Add policy to use system default printer

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 9550 matching lines @@
       'features': {
         'dynamic_refresh': True,
         'per_profile': True,
       },
       'example_value': True,
       'id': 370,
       'caption': '''Allow queries to a Google time service''',
       'tags': [],
       'desc': '''Setting this policy to false stops <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> from occasionally sending queries to a Google server to retrieve an accurate timestamp. These queries will be enabled if this policy is set to True or is not set.''',
     },
+    {
+      'name': 'UseSystemDefaultPrinterAsDefault',
+      'type': 'main',
+      'schema': { 'type': 'boolean' },
+      'supported_on': [
+        'chrome.*:60-',
+        'chrome_os:60-',
+      ],
+      'features': {
+        'can_be_recommended': True,
+        'dynamic_refresh': False,
+        'per_profile': True,
+      },
+      'example_value': False,
+      'id': 371,
+      'caption': '''Use System Default Printer as Default''',
+      'tags': [],
+      'desc': '''Causes <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> to use the system default printer as the default choice in Print Preview instead of the most recently used printer.
+
+      If you disable this setting or do not set a value, Print Preview will use the most recently used printer as the default destination choice.
+
+      If you enable this setting, Print Preview will use the OS system default printer as the default destination choice.''',
+    },
   ],
   'messages': {
     # Messages that are not associated to any policies.
     'win_supported_winxpsp2': {
       'desc': '''A label specifying the oldest possible compatible version of Windows. This text will appear right next to a label containing the text 'Supported on:'.''',
       'text': '''Microsoft Windows XP SP2 or later'''
     },
     'mac_chrome_preferences': {
       'desc': '''A text indicating in Mac OS X Workgroup Manager, that currently the preferences of Chromium are being edited''',
       'text': '''<ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> preferences'''
@@ skipping 113 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': [],
 }