command_buffer: Implement CHROMIUM_framebuffer_mixed_samples extension

gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h

Index: gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
diff --git a/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h b/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
index 7a201b708a620a73148a442029af5f4675c88749..cf9742066c5107ea792cb4fff01b737a9511f46c 100644
--- a/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
@@ -105,6 +105,10 @@ static const GLenum valid_compressed_texture_format_table_es3[] = {
     GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC,
 };
 
+static const GLenum valid_coverage_modulation_components_table[] = {
+    GL_RGB, GL_RGBA, GL_ALPHA, GL_NONE,
+};
+
 static const GLenum valid_draw_mode_table[] = {
     GL_POINTS,         GL_LINE_STRIP,   GL_LINE_LOOP, GL_LINES,
     GL_TRIANGLE_STRIP, GL_TRIANGLE_FAN, GL_TRIANGLES,
@@ -997,6 +1001,9 @@ Validators::Validators()
       cmp_function(valid_cmp_function_table,
                    arraysize(valid_cmp_function_table)),
       compressed_texture_format(),
+      coverage_modulation_components(
+          valid_coverage_modulation_components_table,
+          arraysize(valid_coverage_modulation_components_table)),
       draw_mode(valid_draw_mode_table, arraysize(valid_draw_mode_table)),
       dst_blend_factor(valid_dst_blend_factor_table,
                        arraysize(valid_dst_blend_factor_table)),