Replace all gflag implementations with cvar implementations

src/xenia/app/emulator_window.cc

@@ -7,8 +7,6 @@
  ******************************************************************************
  */
 
-#include <gflags/gflags.h>
-
 #include "xenia/app/emulator_window.h"
 
 // Autogenerated by `xb premake`.
@@ -17,6 +15,7 @@
 #include "third_party/imgui/imgui.h"
 #include "xenia/app/discord/discord_presence.h"
 #include "xenia/base/clock.h"
+#include "xenia/base/cvar.h"
 #include "xenia/base/debugging.h"
 #include "xenia/base/logging.h"
 #include "xenia/base/platform.h"
@@ -29,7 +28,8 @@
 #include "xenia/ui/imgui_dialog.h"
 #include "xenia/ui/imgui_drawer.h"
 
-DEFINE_bool(discord, false, "Enable Discord rich presence");
+DECLARE_bool(debug);
+DEFINE_bool(discord, false, "Enable Discord rich presence", "General");
 
 namespace xe {
 namespace app {
@@ -85,7 +85,7 @@ bool EmulatorWindow::Initialize() {
     return false;
   }
 
-  if (FLAGS_discord) {
+  if (cvars::discord) {
     discord::DiscordPresence::InitializeDiscord();
     discord::DiscordPresence::NotPlaying();
   }
@@ -344,7 +344,7 @@ void EmulatorWindow::FileOpen() {
 void EmulatorWindow::FileClose() {
   if (emulator_->is_title_open()) {
     emulator_->TerminateTitle();
-    if (FLAGS_discord) {
+    if (cvars::discord) {
       discord::DiscordPresence::NotPlaying();
     }
   }
@@ -398,7 +398,7 @@ void EmulatorWindow::CpuTimeScalarSetDouble() {
 }
 
 void EmulatorWindow::CpuBreakIntoDebugger() {
-  if (!FLAGS_debug) {
+  if (!cvars::debug) {
     xe::ui::ImGuiDialog::ShowMessageBox(window_.get(), "Xenia Debugger",
                                         "Xenia must be launched with the "
                                         "--debug flag in order to enable "
@@ -444,7 +444,7 @@ void EmulatorWindow::UpdateTitle() {
     auto game_title = emulator()->game_title();
     title += xe::format_string(L" | [%.8X] %s", emulator()->title_id(),
                                game_title.c_str());
-    if (FLAGS_discord) {
+    if (cvars::discord) {
       discord::DiscordPresence::PlayingTitle(game_title);
     }
   }