Make availability of hotword hardware known to hotword component extension.

chrome/browser/search/hotword_service_factory.cc

Index: chrome/browser/search/hotword_service_factory.cc
diff --git a/chrome/browser/search/hotword_service_factory.cc b/chrome/browser/search/hotword_service_factory.cc
index f456c641d00e988dba22bc33422eb1a4251e419f..5686eb588d5cc1a6559460a33d5c42df2a46f97e 100644
--- a/chrome/browser/search/hotword_service_factory.cc
+++ b/chrome/browser/search/hotword_service_factory.cc
@@ -15,10 +15,6 @@
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 
-#if defined(OS_CHROMEOS)
-#include "chromeos/audio/cras_audio_handler.h"
-#endif
-
 using content::BrowserContext;
 using content::BrowserThread;
 
@@ -50,18 +46,8 @@ bool HotwordServiceFactory::IsAlwaysOnAvailable() {
 // Temporarily disabling hotword hardware check for M42. Will be
 // re-enabled for M43.
 #if 0
-#if defined(OS_CHROMEOS)
-  if (chromeos::CrasAudioHandler::IsInitialized()) {
-    chromeos::AudioDeviceList devices;
-    chromeos::CrasAudioHandler::Get()->GetAudioDevices(&devices);
-    for (size_t i = 0; i < devices.size(); ++i) {
-      if (devices[i].type == chromeos::AUDIO_TYPE_AOKR) {
-        DCHECK(devices[i].is_input);
-        return true;
-      }
-    }
-  }
-#endif
+  if (HotwordService::IsHotwordHardwareAvailable())
+    return true;
 #endif  // 0
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   return command_line->HasSwitch(switches::kEnableExperimentalHotwordHardware);