Display GL window system binding information in about:gpu

ui/gl/gl_implementation_win.cc

Index: ui/gl/gl_implementation_win.cc
diff --git a/ui/gl/gl_implementation_win.cc b/ui/gl/gl_implementation_win.cc
index f0c562648bccbce37f5e111b785b669d67597423..d4b81a9c93dcff5bce70cf95dd6abc17269d210a 100644
--- a/ui/gl/gl_implementation_win.cc
+++ b/ui/gl/gl_implementation_win.cc
@@ -274,4 +274,34 @@ void ClearGLBindings() {
   UnloadGLNativeLibraries();
 }
 
+bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info) {
+  *info = GLWindowSystemBindingInfo();
+  switch (GetGLImplementation()) {
+    case kGLImplementationDesktopGL: {
+      if (!wglGetExtensionsStringEXT)
+        return false;
+      const char* extensions = wglGetExtensionsStringEXT();
+      if (extensions)
+        info->extensions = extensions;
+      return true;
+    }
+    case kGLImplementationEGLGLES2: {
+      EGLDisplay display = eglGetCurrentDisplay();
+      const char* vendor = eglQueryString(display, EGL_VENDOR);
+      const char* version = eglQueryString(display, EGL_VERSION);
+      const char* extensions = eglQueryString(display, EGL_EXTENSIONS);
+      if (vendor)
+        info->vendor = vendor;
+      if (version)
+        info->version = version;
+      if (extensions)
+        info->extensions = extensions;
+      return true;
+    }
+    default:
+      return false;
+  }
+  return false;
+}
+
 }  // namespace gfx