Display GL window system binding information in about:gpu

gpu/config/gpu_info.h

Index: gpu/config/gpu_info.h
diff --git a/gpu/config/gpu_info.h b/gpu/config/gpu_info.h
index f8d9b6039d34217739a75acda295988edbb1c952..fb478b86a448b6c6389987ab9ccd696d522ad9ee 100644
--- a/gpu/config/gpu_info.h
+++ b/gpu/config/gpu_info.h
@@ -111,6 +111,15 @@ struct GPU_EXPORT GPUInfo {
   // The GL_EXTENSIONS string.  "" if we are not using OpenGL.
   std::string gl_extensions;
 
+  // GL window system binding vendor.  "" if not available.
+  std::string gl_ws_vendor;
+
+  // GL window system binding version.  "" if not available.
+  std::string gl_ws_version;
+
+  // GL window system binding extensions.  "" if not available.
+  std::string gl_ws_extensions;
+
   // The device semantics, i.e. whether the Vista and Windows 7 specific
   // semantics are available.
   bool can_lose_context;