Bug 1452740 - Added Policy: Disable Hardware Acceleration r=Felipe

MozReview-Commit-ID: FVrpCRtwQLh

--HG--
extra : rebase_source : ae6ec66f11537b46b0631b195f148ffea580971f

browser/components/enterprisepolicies/Policies.jsm

@@ -495,6 +495,14 @@ var Policies = {
     }
   },
 
+  "HardwareAcceleration": {
+    onBeforeAddons(manager, param) {
+      if (!param) {
+        setAndLockPref("layers.acceleration.disabled", true);
+      }
+    }
+  },
+
   "Homepage": {
     onBeforeUIStartup(manager, param) {
       // |homepages| will be a string containing a pipe-separated ('|') list of

browser/components/enterprisepolicies/schemas/policies-schema.json

@@ -382,6 +382,13 @@
       }
     },
 
+    "HardwareAcceleration": {
+      "description": "If false, prevents ability to turn on hardware acceleration.",
+      "first_available": "60.0",
+
+      "type": "boolean"
+    },
+
     "Homepage": {
       "description": "Set and optionally lock the homepage.",
       "first_available": "60.0",

browser/components/enterprisepolicies/tests/browser/hardware_acceleration/browser.ini

+[DEFAULT]
+prefs =
+  browser.policies.alternatePath='<test-root>/browser/components/enterprisepolicies/tests/browser/hardware_acceleration/disable_hardware_acceleration.json'
+support-files =
+  disable_hardware_acceleration.json
+
+[browser_policy_hardware_acceleration.js]

browser/components/enterprisepolicies/tests/browser/hardware_acceleration/browser_policy_hardware_acceleration.js

+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function test_policy_hardware_acceleration() {
+  let winUtils = Services.wm.getMostRecentWindow("").
+                 QueryInterface(Ci.nsIInterfaceRequestor).
+                 getInterface(Ci.nsIDOMWindowUtils);
+  is(winUtils.layerManagerType, "Basic", "Hardware acceleration disabled");
+});

browser/components/enterprisepolicies/tests/browser/hardware_acceleration/disable_hardware_acceleration.json

+{
+  "policies": {
+    "HardwareAcceleration": false
+  }
+}

browser/components/enterprisepolicies/tests/moz.build

@@ -11,6 +11,7 @@ BROWSER_CHROME_MANIFESTS += [
     'browser/disable_developer_tools/browser.ini',
     'browser/disable_forget_button/browser.ini',
     'browser/disable_fxscreenshots/browser.ini',
+    'browser/hardware_acceleration/browser.ini',
 ]
 
 TESTING_JS_MODULES += [