Revert of Add subscribeUniform extension pipeline

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 6a646ac5067bb40b6c5cf8763b7e203fe67d665c..790b9b3edb89bbba4192891606c871b97c511c9f 100644
--- a/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
@@ -413,10 +413,6 @@
     GL_EXTENSIONS,
 };
 
-static const GLenum valid_subscription_target_table[] = {
-    GL_MOUSE_POSITION_CHROMIUM,
-};
-
 static const GLenum valid_texture_bind_target_table[] = {
     GL_TEXTURE_2D,
     GL_TEXTURE_CUBE_MAP,
@@ -495,10 +491,6 @@
     GL_CLAMP_TO_EDGE,
     GL_MIRRORED_REPEAT,
     GL_REPEAT,
-};
-
-static const GLenum valid_value_buffer_target_table[] = {
-    GL_SUBSCRIBED_VALUES_BUFFER_CHROMIUM,
 };
 
 static const GLint valid_vertex_attrib_size_table[] = {
@@ -601,8 +593,6 @@
                        arraysize(valid_src_blend_factor_table)),
       stencil_op(valid_stencil_op_table, arraysize(valid_stencil_op_table)),
       string_type(valid_string_type_table, arraysize(valid_string_type_table)),
-      subscription_target(valid_subscription_target_table,
-                          arraysize(valid_subscription_target_table)),
       texture_bind_target(valid_texture_bind_target_table,
                           arraysize(valid_texture_bind_target_table)),
       texture_format(valid_texture_format_table,
@@ -626,8 +616,6 @@
                     arraysize(valid_texture_usage_table)),
       texture_wrap_mode(valid_texture_wrap_mode_table,
                         arraysize(valid_texture_wrap_mode_table)),
-      value_buffer_target(valid_value_buffer_target_table,
-                          arraysize(valid_value_buffer_target_table)),
       vertex_attrib_size(valid_vertex_attrib_size_table,
                          arraysize(valid_vertex_attrib_size_table)),
       vertex_attrib_type(valid_vertex_attrib_type_table,