Backends, Examples: WebGPU: header optimization. Added the code for using Dawn “pre-built” library. (#8381)

backends/imgui_impl_wgpu.cpp

@@ -53,7 +53,6 @@
 #include "imgui_impl_wgpu.h"
 #include <limits.h>
 #include <stdio.h>
-#include <webgpu/webgpu.h>
 
 // One of IMGUI_IMPL_WEBGPU_BACKEND_DAWN or IMGUI_IMPL_WEBGPU_BACKEND_WGPU must be provided. See imgui_impl_wgpu.h for more details.
 #if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) == defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)

backends/imgui_impl_wgpu.h

@@ -41,9 +41,7 @@
 #endif
 
 #include <webgpu/webgpu.h>
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
-#include <webgpu/webgpu_cpp.h>  // for wgpu::Device, wgpu::DeviceLostReason, wgpu::ErrorType used by validation layer callbacks.
-#elif !defined(__EMSCRIPTEN__)
+#if defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) && !defined(__EMSCRIPTEN__)
 #include <webgpu/wgpu.h>        // WGPULogLevel
 #endif