Display GL window system binding information in about:gpu

ui/gl/gl_glx_api_implementation.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gl/gl_glx_api_implementation.h"
+#include "ui/gl/gl_implementation.h"
 
 namespace gfx {
 
 RealGLXApi* g_real_glx;
 
 void InitializeGLBindingsGLX() {
   g_driver_glx.InitializeBindings();
   if (!g_real_glx) {
     g_real_glx = new RealGLXApi();
   }
@@ skipping 41 matching lines @@
 RealGLXApi::~RealGLXApi() {
 }
 
 void RealGLXApi::Initialize(DriverGLX* driver) {
   InitializeBase(driver);
 }
 
 TraceGLXApi::~TraceGLXApi() {
 }
 
+bool GetGLWindowSystemBindingInfoGLX(GLWindowSystemBindingInfo* info) {
+  Display* display = glXGetCurrentDisplay();
+  const int kDefaultScreen = 0;
+  const char* vendor =
+      glXQueryServerString(display, kDefaultScreen, GLX_VENDOR);
+  const char* version =
+      glXQueryServerString(display, kDefaultScreen, GLX_VERSION);
+  const char* extensions =
+      glXQueryServerString(display, kDefaultScreen, GLX_EXTENSIONS);
+  *info = GLWindowSystemBindingInfo();
+  if (vendor)
+    info->vendor = vendor;
+  if (version)
+    info->version = version;
+  if (extensions)
+    info->extensions = extensions;
+  return true;
+}
+
 }  // namespace gfx