Only disable hotwording if the VoiceTrigger field trial is set to 'Disabled'.

chrome/browser/search/hotword_service.cc

Index: chrome/browser/search/hotword_service.cc
diff --git a/chrome/browser/search/hotword_service.cc b/chrome/browser/search/hotword_service.cc
index ee90a544a30cc0b8a7d69083acafa8a04059ea90..6afe0f21fbc8d3e763f877797f33ec625704db16 100644
--- a/chrome/browser/search/hotword_service.cc
+++ b/chrome/browser/search/hotword_service.cc
@@ -221,7 +221,6 @@ namespace hotword_internal {
 // Constants for the hotword field trial.
 const char kHotwordFieldTrialName[] = "VoiceTrigger";
 const char kHotwordFieldTrialDisabledGroupName[] = "Disabled";
-const char kHotwordFieldTrialExperimentalGroupName[] = "Experimental";
 // Old preference constant.
 const char kHotwordUnusablePrefName[] = "hotword.search_enabled";
 // String passed to indicate the training state has changed.
@@ -296,13 +295,6 @@ bool HotwordService::DoesHotwordSupportLanguage(Profile* profile) {
 
 // static
 bool HotwordService::IsExperimentalHotwordingEnabled() {
-  std::string group = base::FieldTrialList::FindFullName(
-      hotword_internal::kHotwordFieldTrialName);
-  if (!group.empty() &&
-      group == hotword_internal::kHotwordFieldTrialExperimentalGroupName) {
-    return true;
-  }
-
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   return !command_line->HasSwitch(switches::kDisableExperimentalHotwording);
 }
@@ -670,9 +662,12 @@ bool HotwordService::IsServiceAvailable() {
 bool HotwordService::IsHotwordAllowed() {
   std::string group = base::FieldTrialList::FindFullName(
       hotword_internal::kHotwordFieldTrialName);
-  return !group.empty() &&
-      group != hotword_internal::kHotwordFieldTrialDisabledGroupName &&
-      DoesHotwordSupportLanguage(profile_);
+  // Allow hotwording by default, and only disable if the field trial has been
+  // set.
+  if (group == hotword_internal::kHotwordFieldTrialDisabledGroupName)
+    return false;
+
+  return DoesHotwordSupportLanguage(profile_);
 }
 
 bool HotwordService::IsOptedIntoAudioLogging() {