Move channel-related (Chrome-specific) global state out of Feature.

chrome/browser/extensions/api/app_window/app_window_api.cc

Index: chrome/browser/extensions/api/app_window/app_window_api.cc
diff --git a/chrome/browser/extensions/api/app_window/app_window_api.cc b/chrome/browser/extensions/api/app_window/app_window_api.cc
index a172a5a3c129ea0c84a4106577a837337c438880..bcb83d0898ff699000ee01979885b1069581c268 100644
--- a/chrome/browser/extensions/api/app_window/app_window_api.cc
+++ b/chrome/browser/extensions/api/app_window/app_window_api.cc
@@ -17,7 +17,7 @@
 #include "chrome/browser/extensions/window_controller.h"
 #include "chrome/browser/ui/apps/chrome_shell_window_delegate.h"
 #include "chrome/common/extensions/api/app_window.h"
-#include "chrome/common/extensions/features/feature.h"
+#include "chrome/common/extensions/features/feature_channel.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_process_host.h"
@@ -207,7 +207,7 @@ bool AppWindowCreateFunction::RunImpl() {
         create_params.bounds.set_y(*bounds->top.get());
     }
 
-    if (Feature::GetCurrentChannel() <= chrome::VersionInfo::CHANNEL_DEV ||
+    if (GetCurrentChannel() <= chrome::VersionInfo::CHANNEL_DEV ||
         GetExtension()->location() == extensions::Manifest::COMPONENT) {
       if (options->type == extensions::api::app_window::WINDOW_TYPE_PANEL) {
           create_params.window_type = ShellWindow::WINDOW_TYPE_PANEL;