Bug 1320736 - Part 1: Set installDate in installAddonFromLocation, r=aswan

MozReview-Commit-ID: AB5GexbHYge

--HG--
extra : rebase_source : 9defeb7b88deecea341920f572c18528e7b4c78f
extra : source : 61b2e5fdc05505fa2be55d3abf9d80fbc857db93

toolkit/mozapps/extensions/internal/XPIProvider.jsm

@@ -4065,6 +4065,8 @@ this.XPIProvider = {
         this.unloadBootstrapScope(existingAddonID);
         flushChromeCaches();
       }
+    } else {
+      addon.installDate = Date.now();
     }
 
     let file = addon._sourceBundle;

toolkit/mozapps/extensions/test/xpcshell/test_webextension_install.js

@@ -79,8 +79,11 @@ add_task(function* test_unsigned_no_id_temp_install() {
 
   const addonDir = yield promiseWriteWebManifestForExtension(manifest, gTmpD,
                                                 "the-addon-sub-dir");
+  const testDate = new Date();
   const addon = yield AddonManager.installTemporaryAddon(addonDir);
   ok(addon.id, "ID should have been auto-generated");
+  ok(Math.abs(addon.installDate - testDate) < 10000, "addon has an expected installDate");
+  ok(Math.abs(addon.updateDate - testDate) < 10000, "addon has an expected updateDate");
 
   // The sourceURI of a temporary installed addon should be equal to the
   // file url of the installed source dir.