Revert of Turn on seamless cubemap by default on Desktop GL for ES3.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 0e471a1835d24fb57c5a5889cf8e558b7df56fed..7ecd8d5f47bf07b2f1410eb945e5d1295423c7b6 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -3016,15 +3016,6 @@
     // The desktop core profile changed how program point size mode is
     // enabled.
     glEnable(GL_PROGRAM_POINT_SIZE);
-  }
-
-  // ES3 requires seamless cubemap. ES2 does not.
-  // However, when ES2 is implemented on top of DX11, seamless cubemap is
-  // always enabled and there is no way to disable it.
-  // Therefore, it seems OK to also always enable it on top of Desktop GL for
-  // both ES2 and ES3 contexts.
-  if (feature_info_->gl_version_info().IsAtLeastGL(3, 2)) {
-    glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
   }
 
   has_robustness_extension_ =