[Hotword] Reverse the experimental flag so that it is on by default.

chrome/browser/search/hotword_service_unittest.cc

Index: chrome/browser/search/hotword_service_unittest.cc
diff --git a/chrome/browser/search/hotword_service_unittest.cc b/chrome/browser/search/hotword_service_unittest.cc
index bf1c4a5b4c411b6b01736ddfbfb7aabc4c28a22d..26eaaf1ec13d6c4172e41278174c6ed3673226d3 100644
--- a/chrome/browser/search/hotword_service_unittest.cc
+++ b/chrome/browser/search/hotword_service_unittest.cc
@@ -95,9 +95,9 @@ class HotwordServiceTest :
 
   void SetUp() override {
     extension_id_ = GetParam();
-    if (extension_id_ == extension_misc::kHotwordSharedModuleId) {
+    if (extension_id_ == extension_misc::kHotwordExtensionId) {
       base::CommandLine::ForCurrentProcess()->AppendSwitch(
-          switches::kEnableExperimentalHotwording);
+          switches::kDisableExperimentalHotwording);
     }
 
     extensions::ExtensionServiceTestBase::SetUp();