Dependency injection for apu/gpu/hid.

src/xenia/gpu/gl4/gl4_graphics_system.cc

@@ -24,10 +24,6 @@ namespace xe {
 namespace gpu {
 namespace gl4 {
 
-std::unique_ptr<GraphicsSystem> Create() {
-  return std::make_unique<GL4GraphicsSystem>();
-}
-
 std::unique_ptr<ui::GraphicsContext> GL4GraphicsSystem::CreateContext(
     ui::Window* target_window) {
   // Setup the GL control that actually does the drawing.

src/xenia/gpu/gl4/gl4_trace_viewer_main.cc

@@ -30,6 +30,10 @@ using namespace xe::gpu::xenos;
 
 class GL4TraceViewer : public TraceViewer {
  public:
+  std::unique_ptr<gpu::GraphicsSystem> CreateGraphicsSystem() override {
+    return std::unique_ptr<gpu::GraphicsSystem>(new GL4GraphicsSystem());
+  }
+
   uintptr_t GetColorRenderTarget(uint32_t pitch, MsaaSamples samples,
                                  uint32_t base,
                                  ColorRenderTargetFormat format) override {