gl: Remove redundant methods/variables from GLSurfaceFormat

ui/gl/gl_surface_format.cc

Index: ui/gl/gl_surface_format.cc
diff --git a/ui/gl/gl_surface_format.cc b/ui/gl/gl_surface_format.cc
index b57dbdb847e9dddb773d6ccc82506dfacd926aa3..ff7f6606c8d8f6afcc21d3d7c94632cc0e10164d 100644
--- a/ui/gl/gl_surface_format.cc
+++ b/ui/gl/gl_surface_format.cc
@@ -11,7 +11,6 @@ GLSurfaceFormat::GLSurfaceFormat() {
 }
 
 GLSurfaceFormat::GLSurfaceFormat(SurfacePixelLayout layout) {
-  is_default_ = false;
   pixel_layout_ = layout;
 }
 
@@ -20,10 +19,6 @@ GLSurfaceFormat::GLSurfaceFormat(const GLSurfaceFormat& other) = default;
 GLSurfaceFormat::~GLSurfaceFormat() {
 }
 
-bool GLSurfaceFormat::IsSurfaceless() {
-  return is_surfaceless_;
-}
-
 GLSurfaceFormat::SurfacePixelLayout GLSurfaceFormat::GetPixelLayout() {
   return pixel_layout_;
 }
@@ -32,7 +27,6 @@ void GLSurfaceFormat::SetDefaultPixelLayout(SurfacePixelLayout layout) {
   if (pixel_layout_ == PIXEL_LAYOUT_DONT_CARE &&
       layout != PIXEL_LAYOUT_DONT_CARE) {
     pixel_layout_ = layout;
-    is_default_ = false;
   }
 }
 
@@ -40,12 +34,6 @@ void GLSurfaceFormat::SetRGB565() {
   red_bits_ = blue_bits_ = 5;
   green_bits_ = 6;
   alpha_bits_ = 0;
-  is_default_ = false;
-}
-
-void GLSurfaceFormat::SetIsSurfaceless() {
-  is_surfaceless_ = true;
-  is_default_ = false;
 }
 
 static int GetValue(int num, int default_value) {
@@ -56,14 +44,7 @@ static int GetBitSize(int num) {
   return GetValue(num, 8);
 }
 
-
-bool GLSurfaceFormat::IsDefault() {
-  return is_default_;
-}
-
 bool GLSurfaceFormat::IsCompatible(GLSurfaceFormat other) {
-  if (IsDefault() && other.IsDefault()) return true;
-
   if (GetBitSize(red_bits_) == GetBitSize(other.red_bits_) &&
       GetBitSize(green_bits_) == GetBitSize(other.green_bits_) &&
       GetBitSize(blue_bits_) == GetBitSize(other.blue_bits_) &&
@@ -71,7 +52,6 @@ bool GLSurfaceFormat::IsCompatible(GLSurfaceFormat other) {
       GetValue(stencil_bits_, 8) == GetValue(other.stencil_bits_, 8) &&
       GetValue(depth_bits_, 24) == GetValue(other.depth_bits_, 24) &&
       GetValue(samples_, 0) == GetValue(other.samples_, 0) &&
-      is_surfaceless_ == other.is_surfaceless_ &&
       pixel_layout_ == other.pixel_layout_) {
     return true;
   }
@@ -81,7 +61,6 @@ bool GLSurfaceFormat::IsCompatible(GLSurfaceFormat other) {
 void GLSurfaceFormat::SetDepthBits(int bits) {
   if (bits != -1) {
     depth_bits_ = bits;
-    is_default_ = false;
   }
 }
 
@@ -92,7 +71,6 @@ int GLSurfaceFormat::GetDepthBits() {
 void GLSurfaceFormat::SetStencilBits(int bits) {
   if (bits != -1) {
     stencil_bits_ = bits;
-    is_default_ = false;
   }
 }
 
@@ -103,7 +81,6 @@ int GLSurfaceFormat::GetStencilBits() {
 void GLSurfaceFormat::SetSamples(int num) {
   if (num != -1) {
     samples_ = num;
-    is_default_ = false;
   }
 }