Remove disable-embedded-shared-worker flag and shared worker process related codes.

content/shell/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/config/features.gni")
 import("//build/config/ui.gni")
 import("//tools/grit/grit_rule.gni")
 import("//tools/grit/repack.gni")
 if (is_android) {
   import("//build/config/android/config.gni")
@@ skipping 190 matching lines @@
     "//cc",
     "//components/breakpad/app",
     "//content:resources",
     "//content/gpu",
     "//content/ppapi_plugin",
     "//content/public/browser",
     "//content/public/common",
     "//content/public/plugin",
     "//content/public/renderer",
     "//content/public/utility",
-    "//content/worker",
     "//content/test:layouttest_support",
     "//gin",
     "//gpu",
     "//ipc",
     "//media",
     "//net",
     "//net:net_resources",
     "//skia",
     "//third_party/icu",
     "//third_party/WebKit/public:blink",
@@ skipping 234 matching lines @@
       "//tools/imagediff($host_toolchain)",
     ]
   }
 }
 
 } else {
   # Content shell not ready, make a dummpy to make dependency management easier.
   group("content_shell") {
   }
 }