Revert of Gets gn check to execute cleanly in mojo/common

mojo/environment/BUILD.gn

Index: mojo/environment/BUILD.gn
diff --git a/mojo/environment/BUILD.gn b/mojo/environment/BUILD.gn
index 6b6f6eb77a6e7b71b6449dcf68d301cb50034bd8..9621dfb78cf5d3dfe4956966c312f73f5402d5c2 100644
--- a/mojo/environment/BUILD.gn
+++ b/mojo/environment/BUILD.gn
@@ -7,14 +7,6 @@
   output_name = "mojo_environment_chromium"
 
   sources = [
-    "default_async_waiter_impl.cc",
-    "default_async_waiter_impl.h",
-    "default_logger_impl.cc",
-    "default_logger_impl.h",
-    "default_run_loop_impl.cc",
-    "default_run_loop_impl.h",
-    "default_task_tracker_impl.cc",
-    "default_task_tracker_impl.h",
     "environment.cc",
 
     # TODO(vtl): This is kind of ugly. (See TODO in logging.h.)
@@ -27,19 +19,43 @@
     "//third_party/mojo/src/mojo/public/cpp/environment/task_tracker.h",
   ]
 
+  public_deps = [
+    ":chromium_impl",
+  ]
+
   deps = [
-    "//base",
-    "//base/third_party/dynamic_annotations",
-    "//mojo/common:common_base",
-    "//third_party/mojo/src/mojo/public/cpp/environment:environment",
     "//third_party/mojo/src/mojo/public/c/environment",
     "//third_party/mojo/src/mojo/public/cpp/bindings:callback",
     "//third_party/mojo/src/mojo/public/cpp/environment",
     "//third_party/mojo/src/mojo/public/cpp/system",
+  ]
+}
+
+# GYP version: mojo_base.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",
+    "default_run_loop_impl.cc",
+    "default_run_loop_impl.h",
+    "default_task_tracker_impl.cc",
+    "default_task_tracker_impl.h",
   ]
 
   defines = [ "MOJO_ENVIRONMENT_IMPL_IMPLEMENTATION" ]
 
   public_configs =
       [ "//third_party/mojo/src/mojo/public/build/config:mojo_sdk" ]
+
+  deps = [
+    "//base",
+    "//base/third_party/dynamic_annotations",
+    "//mojo/common:common_base",
+    "//third_party/mojo/src/mojo/public/cpp/environment:environment",
+  ]
 }