command_buffer_gles2: Implement EGL default Display as a global object

gpu/gles2_conform_support/egl/surface.h

Index: gpu/gles2_conform_support/egl/surface.h
diff --git a/gpu/gles2_conform_support/egl/surface.h b/gpu/gles2_conform_support/egl/surface.h
index 3db553efe566c17a753e4a6b4350f6112be3785b..84ba0aac2d1ac2c79eab9b0d614be7205b786134 100644
--- a/gpu/gles2_conform_support/egl/surface.h
+++ b/gpu/gles2_conform_support/egl/surface.h
@@ -8,19 +8,28 @@
 #include <EGL/egl.h>
 
 #include "base/macros.h"
-
+#include "base/memory/ref_counted.h"
+namespace gfx {
+class GLSurface;
+}
 namespace egl {
 
-class Surface {
+class Surface : public base::RefCountedThreadSafe<Surface> {
  public:
-  explicit Surface(EGLNativeWindowType win);
-  ~Surface();
-
-  EGLNativeWindowType window() { return window_; }
+  explicit Surface(gfx::GLSurface* gl_surface);
+  void set_is_current_in_some_thread(bool flag) {
+    is_current_in_some_thread_ = flag;
+  }
+  bool is_current_in_some_thread() const { return is_current_in_some_thread_; }
+  gfx::GLSurface* gl_surface() const;
+  static bool ValidatePbufferAttributeList(const EGLint* attrib_list);
+  static bool ValidateWindowAttributeList(const EGLint* attrib_list);
 
  private:
-  EGLNativeWindowType window_;
-
+  friend class base::RefCountedThreadSafe<Surface>;
+  ~Surface();
+  bool is_current_in_some_thread_;
+  scoped_refptr<gfx::GLSurface> gl_surface_;
   DISALLOW_COPY_AND_ASSIGN(Surface);
 };