gl: Remove redundant methods/variables from GLSurfaceFormat

ui/gl/gl_surface_format_unittest.cc

 // 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.
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gl/gl_surface_format.h"
 
 namespace gl {
 
 TEST(GLSurfaceFormatTest, BasicTest) {
   {
     // Check default format properties.
     GLSurfaceFormat format = GLSurfaceFormat();
-    EXPECT_TRUE(format.IsDefault());
     EXPECT_EQ(32, format.GetBufferSize());
-    EXPECT_FALSE(format.IsSurfaceless());
     EXPECT_EQ(GLSurfaceFormat::PIXEL_LAYOUT_DONT_CARE,
               format.GetPixelLayout());
   }
 
   {
     // Check rgb565 format as used for low-end Android devices.
     GLSurfaceFormat format = GLSurfaceFormat();
     format.SetRGB565();
-    EXPECT_FALSE(format.IsDefault());
     EXPECT_EQ(16, format.GetBufferSize());
   }
 
   {
-    // Check surfaceless format.
-    GLSurfaceFormat format = GLSurfaceFormat();
-    format.SetIsSurfaceless();
-    EXPECT_FALSE(format.IsDefault());
-    EXPECT_TRUE(format.IsSurfaceless());
-  }
-
-  {
     // Check custom pixel layout.
     GLSurfaceFormat format = GLSurfaceFormat(
         GLSurfaceFormat::PIXEL_LAYOUT_RGBA);
-    EXPECT_FALSE(format.IsDefault());
     EXPECT_EQ(GLSurfaceFormat::PIXEL_LAYOUT_RGBA,
               format.GetPixelLayout());
 
     // The custom pixel layout should remain after other modifications.
     format.SetDepthBits(24);
     EXPECT_EQ(GLSurfaceFormat::PIXEL_LAYOUT_RGBA,
               format.GetPixelLayout());
     EXPECT_EQ(24, format.GetDepthBits());
   }
 
   {
     // Check IsCompatible
     GLSurfaceFormat format = GLSurfaceFormat();
     EXPECT_TRUE(format.IsCompatible(GLSurfaceFormat()));
 
     GLSurfaceFormat other = GLSurfaceFormat();
     other.SetRGB565();
     EXPECT_FALSE(format.IsCompatible(other));
     EXPECT_TRUE(other.IsCompatible(other));
   }
 }
 
 }