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 9608 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': 'PrintPreviewUseSystemDefaultPrinter',
+      'type': 'main',
+      'schema': { 'type': 'boolean' },
+      'supported_on': [
+        'chrome.*:60-',
+      ],
+      'features': {
+        'can_be_recommended': True,
+        'dynamic_refresh': False,

[pastarmovj, 2017/06/16 08:23:41]

Just to make sure - is this policy only consulted once on start? IF so than this
is correct. If however the print dialog will change its behavior for consecutive
prints when the policy is flipped than this must be true it doesn't have to flip
the behavior of an already opened print dialog though.

[rbpotter, 2017/06/16 17:51:25]

Fixed.

It will change for later prints, as it is consulted each time the
print preview UI is created. However, it is only consulted at dialog
creation, so as you suggested flipping the policy would not affect
a dialog that was already open.

+        'per_profile': True,
+      },
+      'example_value': False,
+      'id': 372,
+      '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': [],
 }