Bug 1769091 - Add some more prefs/telemetry around GMP installation. r=chutten

We have a number of users that check for updates but don't seem to
actually update. This should help narrow down what's going wrong.

Differential Revision: https://phabricator.services.mozilla.com/D146216

toolkit/components/telemetry/app/TelemetryEnvironment.jsm

@@ -324,6 +324,8 @@ const DEFAULT_ENVIRONMENT_PREFS = new Map([
   ["layers.prefer-opengl", { what: RECORD_PREF_VALUE }],
   ["layout.css.devPixelsPerPx", { what: RECORD_PREF_VALUE }],
   ["media.gmp-gmpopenh264.enabled", { what: RECORD_PREF_VALUE }],
+  ["media.gmp-gmpopenh264.lastInstallStart", { what: RECORD_PREF_VALUE }],
+  ["media.gmp-gmpopenh264.lastDownload", { what: RECORD_PREF_VALUE }],
   ["media.gmp-gmpopenh264.lastUpdate", { what: RECORD_PREF_VALUE }],
   ["media.gmp-gmpopenh264.visible", { what: RECORD_PREF_VALUE }],
   ["media.gmp-manager.lastCheck", { what: RECORD_PREF_VALUE }],

toolkit/components/telemetry/docs/data/environment.rst

@@ -423,6 +423,10 @@ The following is a partial list of `collected preferences <https://searchfox.org
 
 - ``media.gmp-gmpopenh264.enabled``: Whether OpenH264 is enabled.
 
+- ``media.gmp-gmpopenh264.lastDownload``: When OpenH264 was last download.
+
+- ``media.gmp-gmpopenh264.lastInstallStart``: When OpenH264 installation was last started.
+
 - ``media.gmp-gmpopenh264.lastUpdate``: When OpenH264 was last updated.
 
 - ``media.gmp-gmpopenh264.visible``: Whether OpenH264 is visible.

toolkit/modules/GMPInstallManager.jsm

@@ -726,6 +726,8 @@ GMPDownloader.prototype = {
    */
   start() {
     let log = getScopedLogger("GMPDownloader");
+    let now = Math.round(Date.now() / 1000);
+    GMPPrefs.setInt(GMPPrefs.KEY_PLUGIN_LAST_INSTALL_START, now, gmpAddon.id);
     let gmpAddon = this._gmpAddon;
 
     if (!gmpAddon.isValid) {
@@ -743,6 +745,8 @@ GMPDownloader.prototype = {
     };
     return ProductAddonChecker.downloadAddon(gmpAddon, downloadOptions).then(
       zipPath => {
+        let now = Math.round(Date.now() / 1000);
+        GMPPrefs.setInt(GMPPrefs.KEY_PLUGIN_LAST_DOWNLOAD, now, gmpAddon.id);
         log.info(
           `install to directory path: ${gmpAddon.id}/${gmpAddon.version}`
         );

toolkit/modules/GMPUtils.jsm

@@ -125,6 +125,8 @@ var GMPUtils = {
 var GMPPrefs = {
   KEY_EME_ENABLED: "media.eme.enabled",
   KEY_PLUGIN_ENABLED: "media.{0}.enabled",
+  KEY_PLUGIN_LAST_DOWNLOAD: "media.{0}.lastDownload",
+  KEY_PLUGIN_LAST_INSTALL_START: "media.{0}.lastInstallStart",
   KEY_PLUGIN_LAST_UPDATE: "media.{0}.lastUpdate",
   KEY_PLUGIN_VERSION: "media.{0}.version",
   KEY_PLUGIN_AUTOUPDATE: "media.{0}.autoupdate",