Move fetchers into mojo/shell/fetcher

mojo/shell/BUILD.gn

Index: mojo/shell/BUILD.gn
diff --git a/mojo/shell/BUILD.gn b/mojo/shell/BUILD.gn
index 19aae240c3b6d71c5efcf795fa7389072e7a7910..202d4ddbdee6bf20623cc9c53f8736fcbe4f9035 100644
--- a/mojo/shell/BUILD.gn
+++ b/mojo/shell/BUILD.gn
@@ -80,13 +80,13 @@ source_set("test_support") {
 
 test("mojo_shell_unittests") {
   sources = [
-    "../fetcher/about_fetcher_unittest.cc",
-    "../fetcher/data_fetcher_unittest.cc",
-    "../fetcher/network_fetcher_unittest.cc",
-    "../fetcher/url_resolver_unittest.cc",
     "application_manager_unittest.cc",
     "capability_filter_unittest.cc",
     "data_pipe_peek_unittest.cc",
+    "fetcher/about_fetcher_unittest.cc",
+    "fetcher/data_fetcher_unittest.cc",
+    "fetcher/network_fetcher_unittest.cc",
+    "fetcher/url_resolver_unittest.cc",
     "query_util_unittest.cc",
   ]
 
@@ -97,8 +97,8 @@ test("mojo_shell_unittests") {
     "//base",
     "//mojo/application/public/cpp",
     "//mojo/edk/system:test_utils",
-    "//mojo/fetcher",
     "//mojo/public/cpp/system",
+    "//mojo/shell/fetcher",
     "//mojo/shell/package_manager",
     "//mojo/util:filename_util",
     "//testing/gtest",