chromeos: Refactor system tray Wi-Fi connect dialog so it works with mash

ash/common/system/tray/system_tray_controller.h

Index: ash/common/system/tray/system_tray_controller.h
diff --git a/ash/common/system/tray/system_tray_controller.h b/ash/common/system/tray/system_tray_controller.h
index 0a595036d723d8d58087d4c1149368d158c89d31..442ba0e0542f6a5f8cca90389db39038dd7031e4 100644
--- a/ash/common/system/tray/system_tray_controller.h
+++ b/ash/common/system/tray/system_tray_controller.h
@@ -5,7 +5,9 @@
 #ifndef ASH_COMMON_SYSTEM_TRAY_SYSTEM_TRAY_CONTROLLER_H_
 #define ASH_COMMON_SYSTEM_TRAY_SYSTEM_TRAY_CONTROLLER_H_
 
+#include "ash/ash_export.h"
 #include "ash/public/interfaces/system_tray.mojom.h"
+#include "base/compiler_specific.h"
 #include "base/i18n/time_formatting.h"
 #include "base/macros.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
@@ -29,7 +31,8 @@ namespace ash {
 //
 // TODO: Consider renaming this to SystemTrayClient or renaming the current
 // SystemTray to SystemTrayView and making this class SystemTray.
-class SystemTrayController : public mojom::SystemTray {
+class ASH_EXPORT SystemTrayController
+    : NON_EXPORTED_BASE(public mojom::SystemTray) {
  public:
   explicit SystemTrayController(shell::Connector* connector);
   ~SystemTrayController() override;
@@ -49,6 +52,7 @@ class SystemTrayController : public mojom::SystemTray {
   void ShowPaletteHelp();
   void ShowPaletteSettings();
   void ShowPublicAccountInfo();
+  void ShowNetworkConfigure(const std::string& network_id);
   void ShowNetworkSettings(const std::string& network_id);
   void ShowProxySettings();