[Device Discovery] Make DialRegistry a Singleton

chrome/browser/extensions/api/dial/dial_api_factory.cc

Index: chrome/browser/extensions/api/dial/dial_api_factory.cc
diff --git a/chrome/browser/extensions/api/dial/dial_api_factory.cc b/chrome/browser/extensions/api/dial/dial_api_factory.cc
index 3acbe8b70ebf21dea47e2674df1c00bd5e310a49..2ac2cdb1b185566f2b151af70812c06f21d3acd7 100644
--- a/chrome/browser/extensions/api/dial/dial_api_factory.cc
+++ b/chrome/browser/extensions/api/dial/dial_api_factory.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/extensions/api/dial/dial_api_factory.h"
 
 #include "chrome/browser/extensions/api/dial/dial_api.h"
+#include "chrome/browser/media/router/discovery/dial/dial_registry_factory.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "extensions/browser/extension_system_provider.h"
 #include "extensions/browser/extensions_browser_client.h"
@@ -26,6 +27,7 @@ DialAPIFactory* DialAPIFactory::GetInstance() {
 DialAPIFactory::DialAPIFactory() : RefcountedBrowserContextKeyedServiceFactory(
     "DialAPI", BrowserContextDependencyManager::GetInstance()) {
   DependsOn(ExtensionsBrowserClient::Get()->GetExtensionSystemFactory());
+  DependsOn(media_router::DialRegistryFactory::GetInstance());
 }
 
 DialAPIFactory::~DialAPIFactory() {