Remove ENABLE_VR_SHELL compile-time define.

chrome/common/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/buildflag_header.gni")
 import("//build/util/process_version.gni")
 import("//chrome/common/features.gni")
 import("//chrome/process_version_rc_template.gni")  # For branding_file_path.
 import("//extensions/features/features.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
@@ skipping 502 matching lines @@
         "safe_browsing/protobuf_message_size_macros.h",
         "safe_browsing/protobuf_message_write_macros.h",
         "safe_browsing/zip_analyzer.cc",
         "safe_browsing/zip_analyzer.h",
         "safe_browsing/zip_analyzer_results.cc",
         "safe_browsing/zip_analyzer_results.h",
       ]
     }
   }
 
-  if (enable_vr_shell) {
-    defines += [ "ENABLE_VR_SHELL" ]
-  }
-
   if (is_linux) {
     deps = [
       "//sandbox/linux:sandbox_services",
     ]
   }
 
   if (enable_pepper_cdms) {
     sources += [
       "media/cdm_host_file_path.cc",
       "media/cdm_host_file_path.h",
@@ skipping 168 matching lines @@
 mojom("instant_mojom") {
   sources = [
     "instant.mojom",
   ]
 
   public_deps = [
     "//mojo/common:common_custom_types",
     "//url/mojo:url_mojom_gurl",
   ]
 }