Add support for khronos gl-cts using its drawElements apis

gpu/khronos_glcts_support/native/egl_native_windowless.cc

Index: gpu/khronos_glcts_support/native/egl_native_windowless.cc
diff --git a/gpu/khronos_glcts_support/native/egl_native_windowless.cc b/gpu/khronos_glcts_support/native/egl_native_windowless.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ac0e908ec714e66ef365cd4e63f10ce9f92dad0a
--- /dev/null
+++ b/gpu/khronos_glcts_support/native/egl_native_windowless.cc
@@ -0,0 +1,67 @@
+// Copyright 2014 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.
+
+// Using egl_native from gles2_conform_support
+// TODO: We may want to phase out the old gles2_conform support in preference
+// of this implementation.  So eventually we'll need to move the egl_native
+// stuff here or to a shareable location/path.
+#include "gpu/gles2_conform_support/egl/display.h"
+
+#include "third_party/khronos_glcts/framework/egl/tcuEglPlatform.hpp"
+
+namespace egl {
+namespace native {
+namespace windowless {
+
+class Window : public tcu::NativeWindow {
+ public:
+  Window(tcu::egl::Display& display,
+         EGLConfig config,
+         const EGLint* attribList,
+         int width,
+         int height)
+      : tcu::NativeWindow::NativeWindow(),
+        eglDisplay_(display),
+        eglSurface_(display, config, (EGLNativeWindowType)NULL, attribList) {}
+
+  virtual ~Window() {}
+
+  tcu::egl::Display& getEglDisplay() { return eglDisplay_; }
+
+  tcu::egl::WindowSurface& getEglSurface() { return eglSurface_; }
+
+  void processEvents() { return; }
+
+ private:
+  tcu::egl::Display& eglDisplay_;
+  tcu::egl::WindowSurface eglSurface_;
+};
+
+class Platform : public tcu::EglPlatform {
+ public:
+  Platform() : tcu::EglPlatform::EglPlatform() {}
+
+  virtual ~Platform() {}
+
+  tcu::NativeWindow* createWindow(tcu::NativeDisplay& dpy,
+                                  EGLConfig config,
+                                  const EGLint* attribList,
+                                  int width,
+                                  int height,
+                                  qpVisibility visibility) {
+    tcu::egl::Display& eglDisplay = dpy.getEglDisplay();
+    egl::Display* display =
+        static_cast<egl::Display*>(eglDisplay.getEGLDisplay());
+    display->SetCreateOffscreen(width, height);
+    return new Window(eglDisplay, config, attribList, width, height);
+  }
+};
+
+}  // namespace windowless
+}  // namespace native
+}  // namespace egl
+
+tcu::Platform* createPlatform(void) {
+  return new egl::native::windowless::Platform();
+}