Move package_manager into mojo/shell

mojo/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("//mojo/public/mojo_application.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 
 source_set("shell") {
   output_name = "mojo_shell"
@@ skipping 80 matching lines @@
   ]
 
   deps = [
     ":shell",
     ":test_bindings",
     ":test_support",
     "//base",
     "//mojo/application/public/cpp",
     "//mojo/edk/system:test_utils",
     "//mojo/fetcher",
-    "//mojo/package_manager",
     "//mojo/public/cpp/system",
+    "//mojo/shell/package_manager",
     "//mojo/util:filename_util",
     "//testing/gtest",
     "//third_party/mojo/src/mojo/edk/test:run_all_unittests",
     "//url",
   ]
 }
 
 mojom("test_bindings") {
   sources = [
     "application_manager_apptests.mojom",
@@ skipping 57 matching lines @@
 
   deps = [
     ":test_bindings",
     "//base",
     "//mojo/application/public/cpp",
     "//mojo/common:common_base",
     "//mojo/converters/network",
     "//mojo/runner/child:test_native_main",
   ]
 }