Fix some spelling in extension_updater_unittest.cc

chrome/browser/extensions/updater/extension_updater_unittest.cc

Index: chrome/browser/extensions/updater/extension_updater_unittest.cc
diff --git a/chrome/browser/extensions/updater/extension_updater_unittest.cc b/chrome/browser/extensions/updater/extension_updater_unittest.cc
index 33b7cdfdf18b4774d05fb77e4fafc0c1a8023b9b..44f2ad11f719be984d08cce816aad7e057b51a61 100644
--- a/chrome/browser/extensions/updater/extension_updater_unittest.cc
+++ b/chrome/browser/extensions/updater/extension_updater_unittest.cc
@@ -1250,7 +1250,7 @@ class ExtensionUpdaterTest : public testing::Test {
   content::TestBrowserThread io_thread_;
 };
 
-// Because we test some private methods of ExtensionUpdater, it's easer for the
+// Because we test some private methods of ExtensionUpdater, it's easier for the
 // actual test code to live in ExtenionUpdaterTest methods instead of TEST_F
 // subclasses where friendship with ExtenionUpdater is not inherited.