Introduce networking.cast API

chrome/browser/extensions/api/chrome_extensions_api_client.cc

Index: chrome/browser/extensions/api/chrome_extensions_api_client.cc
diff --git a/chrome/browser/extensions/api/chrome_extensions_api_client.cc b/chrome/browser/extensions/api/chrome_extensions_api_client.cc
index 9aa074a35ff99f62463cca7aba510ad82f884b95..0ffe5d98ca0392ab73cf73b35e894ba4ff96f61b 100644
--- a/chrome/browser/extensions/api/chrome_extensions_api_client.cc
+++ b/chrome/browser/extensions/api/chrome_extensions_api_client.cc
@@ -14,6 +14,7 @@
 #include "chrome/browser/extensions/api/declarative_content/default_content_predicate_evaluators.h"
 #include "chrome/browser/extensions/api/management/chrome_management_api_delegate.h"
 #include "chrome/browser/extensions/api/metrics_private/chrome_metrics_private_delegate.h"
+#include "chrome/browser/extensions/api/networking_cast_private/chrome_networking_cast_private_delegate.h"
 #include "chrome/browser/extensions/api/storage/managed_value_store_cache.h"
 #include "chrome/browser/extensions/api/storage/sync_value_store_cache.h"
 #include "chrome/browser/extensions/api/web_request/chrome_extension_web_request_event_router_delegate.h"
@@ -168,6 +169,16 @@ MetricsPrivateDelegate* ChromeExtensionsAPIClient::GetMetricsPrivateDelegate() {
   return metrics_private_delegate_.get();
 }
 
+NetworkingCastPrivateDelegate*
+ChromeExtensionsAPIClient::GetNetworkingCastPrivateDelegate() {
+#if defined(OS_CHROMEOS) || defined(OS_WIN) || defined(OS_MACOSX)
+  if (!networking_cast_private_delegate_)
+    networking_cast_private_delegate_ =
+        ChromeNetworkingCastPrivateDelegate::Create();
+#endif
+  return networking_cast_private_delegate_.get();
+}
+
 #if defined(OS_CHROMEOS)
 NonNativeFileSystemDelegate*
 ChromeExtensionsAPIClient::GetNonNativeFileSystemDelegate() {