Use loadable module instead of shared library.

mojo/environment/BUILD.gn

Index: mojo/environment/BUILD.gn
diff --git a/mojo/environment/BUILD.gn b/mojo/environment/BUILD.gn
index d25a94d58ea3184d9bc83c44333f52ec6b65b24d..820e7c35cf3f0b5681a0548a965459cbc01867e1 100644
--- a/mojo/environment/BUILD.gn
+++ b/mojo/environment/BUILD.gn
@@ -7,36 +7,14 @@ static_library("chromium") {
   output_name = "mojo_environment_chromium"
 
   sources = [
-    "environment.cc",
-    # TODO(vtl): This is kind of ugly. (See TODO in logging.h.)
-    "../public/cpp/environment/logging.h",
-    "../public/cpp/environment/lib/logging.cc",
-  ]
-
-  deps = [
-    ":chromium_impl",
-    "//mojo/common",
-  ]
-
-  forward_dependent_configs_from = [
-    ":chromium_impl",
-  ]
-}
-
-# GYP version: mojo.gyp:mojo_environment_chromium_impl
-component("chromium_impl") {
-  output_name = "mojo_environment_impl"
-  visibility = "//mojo/*"
-
-  sources = [
     "default_async_waiter_impl.cc",
     "default_async_waiter_impl.h",
     "default_logger_impl.cc",
     "default_logger_impl.h",
-  ]
-
-  defines = [
-    "MOJO_ENVIRONMENT_IMPL_IMPLEMENTATION",
+    "environment.cc",
+    # TODO(vtl): This is kind of ugly. (See TODO in logging.h.)
+    "../public/cpp/environment/logging.h",
+    "../public/cpp/environment/lib/logging.cc",
   ]
 
   deps = [