Document deprecated plugin policies as such.

components/policy/resources/policy_templates.json

Index: components/policy/resources/policy_templates.json
diff --git a/components/policy/resources/policy_templates.json b/components/policy/resources/policy_templates.json
index ca1023a7a9e1552b29933398c8a2e4a3dc956156..2abd71cf85bff8d952c4f6c8487ac5ce96fe5135 100644
--- a/components/policy/resources/policy_templates.json
+++ b/components/policy/resources/policy_templates.json
@@ -1335,6 +1335,7 @@
         'items': { 'type': 'string' },
       },
       'supported_on': ['chrome.*:8-', 'chrome_os:11-'],
+      'deprecated': True,
       'features': {
         'dynamic_refresh': True,
         'per_profile': True,
@@ -1343,7 +1344,9 @@
       'id': 19,
       'caption': '''Specify a list of disabled plugins''',
       'tags': [],
-      'desc': '''Specifies a list of plugins that are disabled in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> and prevents users from changing this setting.
+      'desc': '''This policy is deprecated. Please use the DefaultPluginsSetting to control the avalability of the Flash plugin and AlwaysOpenPdfExternally to control whether the integrated PDF viewer should be used for opening PDF files.

[Thiemo Nagel, 2016/10/14 12:28:19]

Please use <ph name ...> to mark policy names as untranslateable.

[pastarmovj, 2016/10/14 12:45:49]

Done, although this is almost the only place we are doing this.

I think we should do it globally but not as part of this CL :)

[Thiemo Nagel, 2016/10/14 14:22:53]

Yes, I know. Translators have asked for it though...
Full ack.

Nit: PLUGIN_SETTING is missing s after plugin.  Also the other users of that
syntax seem to append _POLICY.

+
+      Specifies a list of plugins that are disabled in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> and prevents users from changing this setting.
 
       The wildcard characters '*' and '?' can be used to match sequences of arbitrary characters. '*' matches an arbitrary number of characters while '?' specifies an optional single character, i.e. matches zero or one characters. The escape character is '\\', so to match actual '*', '?', or '\\' characters, you can put a '\\' in front of them.
 
@@ -1362,6 +1365,7 @@
         'items': { 'type': 'string' },
       },
       'supported_on': ['chrome.*:11-', 'chrome_os:11-'],
+      'deprecated': True,
       'features': {
         'dynamic_refresh': True,
         'per_profile': True,
@@ -1370,7 +1374,9 @@
       'id': 78,
       'caption': '''Specify a list of enabled plugins''',
       'tags': ['system-security'],
-      'desc': '''Specifies a list of plugins that are enabled in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> and prevents users from changing this setting.
+      'desc': '''This policy is deprecated. Please use the DefaultPluginsSetting to control the avalability of the Flash plugin and AlwaysOpenPdfExternally to control whether the integrated PDF viewer should be used for opening PDF files.
+
+      Specifies a list of plugins that are enabled in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> and prevents users from changing this setting.
 
       The wildcard characters '*' and '?' can be used to match sequences of arbitrary characters. '*' matches an arbitrary number of characters while '?' specifies an optional single character, i.e. matches zero or one characters. The escape character is '\\', so to match actual '*', '?', or '\\' characters, you can put a '\\' in front of them.
 
@@ -1389,6 +1395,7 @@
         'items': { 'type': 'string' },
       },
       'supported_on': ['chrome.*:11-', 'chrome_os:11-'],
+      'deprecated': True,
       'features': {
         'dynamic_refresh': True,
         'per_profile': True,
@@ -1397,7 +1404,9 @@
       'id': 79,
       'caption': '''Specify a list of plugins that the user can enable or disable''',
       'tags': [],
-      'desc': '''Specifies a list of plugins that user can enable or disable in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph>.
+      'desc': '''This policy is deprecated. Please use the DefaultPluginsSetting to control the avalability of the Flash plugin and AlwaysOpenPdfExternally to control whether the integrated PDF viewer should be used for opening PDF files.
+
+      Specifies a list of plugins that user can enable or disable in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph>.
 
       The wildcard characters '*' and '?' can be used to match sequences of arbitrary characters. '*' matches an arbitrary number of characters while '?' specifies an optional single character, i.e. matches zero or one characters. The escape character is '\\', so to match actual '*', '?', or '\\' characters, you can put a '\\' in front of them.