Move Mus into chrome's process when running with --mus.

ui/aura/env.cc

Index: ui/aura/env.cc
diff --git a/ui/aura/env.cc b/ui/aura/env.cc
index 0f412fb66ebad12b2c97023f4a5fd08c138670d8..67bc1d7bd33511896e5e3cecbdfcf9103459d317 100644
--- a/ui/aura/env.cc
+++ b/ui/aura/env.cc
@@ -61,6 +61,7 @@ Env::~Env() {
 
 // static
 std::unique_ptr<Env> Env::CreateInstance(Mode mode) {
+  LOG(ERROR) << "Env::CreateInstance";
   DCHECK(!lazy_tls_ptr.Pointer()->Get());
   std::unique_ptr<Env> env(new Env(mode));
   env->Init();
@@ -70,8 +71,13 @@ std::unique_ptr<Env> Env::CreateInstance(Mode mode) {
 // static
 Env* Env::GetInstance() {
   Env* env = lazy_tls_ptr.Pointer()->Get();
-  DCHECK(env) << "Env::CreateInstance must be called before getting the "
-                 "instance of Env.";
+//  DCHECK(env) << "~~Env::CreateInstance must be called before getting the "
+//                 "instance of Env.";
+  if (!env) {
+    LOG(ERROR) << "~~Env::CreateInstance must be called before getting the "
+                   "instance of Env.";
+    base::debug::StackTrace().Print();
+  }
   return env;
 }