gl: Remove redundant methods/variables from GLSurfaceFormat

ui/gl/gl_surface_egl.cc

Index: ui/gl/gl_surface_egl.cc
diff --git a/ui/gl/gl_surface_egl.cc b/ui/gl/gl_surface_egl.cc
index 9196ca0b094fb5621a4fc78e7efec853cd56b91f..497c0e61b054de278c0b5755fd15c53de56512f3 100644
--- a/ui/gl/gl_surface_egl.cc
+++ b/ui/gl/gl_surface_egl.cc
@@ -271,7 +271,7 @@ bool ValidateEglConfig(EGLDisplay display,
   return true;
 }
 
-EGLConfig ChooseConfig(GLSurfaceFormat format) {
+EGLConfig ChooseConfig(GLSurfaceFormat format, bool surfaceless) {
   // Choose an EGL configuration.
   // On X this is only used for PBuffer surfaces.
 
@@ -299,9 +299,8 @@ EGLConfig ChooseConfig(GLSurfaceFormat format) {
   }
 #endif
 
-  EGLint surface_type = (format.IsSurfaceless()
-                            ? EGL_DONT_CARE
-                            : EGL_WINDOW_BIT | EGL_PBUFFER_BIT);
+  EGLint surface_type =
+      (surfaceless ? EGL_DONT_CARE : EGL_WINDOW_BIT | EGL_PBUFFER_BIT);
 
   for (auto renderable_type : renderable_types) {
     EGLint config_attribs_8888[] = {EGL_BUFFER_SIZE,
@@ -495,7 +494,7 @@ EGLDisplay GLSurfaceEGL::GetDisplay() {
 
 EGLConfig GLSurfaceEGL::GetConfig() {
   if (!config_) {
-    config_ = ChooseConfig(format_);
+    config_ = ChooseConfig(format_, IsSurfaceless());
   }
   return config_;
 }
@@ -1201,14 +1200,9 @@ PbufferGLSurfaceEGL::~PbufferGLSurfaceEGL() {
   Destroy();
 }
 
-SurfacelessEGL::SurfacelessEGL(const gfx::Size& size)
-    : size_(size) {
-  format_ = GLSurfaceFormat();
-  format_.SetIsSurfaceless();
-}
+SurfacelessEGL::SurfacelessEGL(const gfx::Size& size) : size_(size) {}
 
 bool SurfacelessEGL::Initialize(GLSurfaceFormat format) {
-  format.SetIsSurfaceless();
   format_ = format;
   return true;
 }