gl: Remove redundant methods/variables from GLSurfaceFormat

ui/gl/gl_surface_format.h

 // Copyright 2017 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.
 
 #ifndef UI_GL_GL_SURFACE_FORMAT_H_
 #define UI_GL_GL_SURFACE_FORMAT_H_
 
 #include "ui/gl/gl_export.h"
 
 namespace gl {
@@ skipping 17 matching lines @@
   GLSurfaceFormat();
 
   // Use a specified pixel layout, cf. gl_surface_osmesa.
   GLSurfaceFormat(SurfacePixelLayout layout);
 
   // Copy constructor from pre-existing format.
   GLSurfaceFormat(const GLSurfaceFormat& other);
 
   ~GLSurfaceFormat();
 
-  // Helper method to determine if the format is unchanged from the
-  // default at creation time. TODO(klausw): can this be removed?
-  bool IsDefault();
-
-  // Surfaceless appears as a format property for backwards
-  // compatibility with the previous enum-based implementation.
-  // TODO(klausw): consider removing it and/or merging it into the
-  // pre-existing IsSurfaceless() predicate for the various Surface
-  // subclasses?
-  void SetIsSurfaceless();
-  bool IsSurfaceless();
-
   // A given pair of surfaces is considered compatible if glSetSurface
   // can be used to switch between them without generating BAD_MATCH
   // errors, visual errors, or gross inefficiency, and incompatible
   // otherwise. For example, a pixel layout mismatch would be
   // considered incompatible. This comparison only makes sense within
   // the context of a single gl_surface subtype.
   bool IsCompatible(GLSurfaceFormat other_format);
 
   // Default pixel format is RGBA8888. Use this method to select
   // a preference of RGB565. TODO(klausw): use individual setter
@@ skipping 13 matching lines @@
   void SetDefaultPixelLayout(SurfacePixelLayout layout);
 
   SurfacePixelLayout GetPixelLayout();
 
   // Compute number of bits needed for storing one pixel, not
   // including any padding. At this point mainly used to distinguish
   // RGB565 (16) from RGBA8888 (32).
   int GetBufferSize();
 
  private:
-  bool is_default_ = true;
   SurfacePixelLayout pixel_layout_ = PIXEL_LAYOUT_DONT_CARE;
-  bool is_surfaceless_ = false;
   int red_bits_ = -1;
   int green_bits_ = -1;
   int blue_bits_ = -1;
   int alpha_bits_ = -1;
   int depth_bits_ = -1;
   int samples_ = -1;
   int stencil_bits_ = -1;
 };
 
 }  // namespace gl
 
 #endif  // UI_GL_GL_SURFACE_FORMAT_H_