Explicit initialization of aura::Env for browser shell.

content/browser/web_contents/web_contents_view_aura.cc

Index: content/browser/web_contents/web_contents_view_aura.cc
diff --git a/content/browser/web_contents/web_contents_view_aura.cc b/content/browser/web_contents/web_contents_view_aura.cc
index 90e2d77ab0c94ce89d468c6b55f86aef8550ab30..29a29bd709fa0f3ec5ebb41b895afbfff943d1b6 100644
--- a/content/browser/web_contents/web_contents_view_aura.cc
+++ b/content/browser/web_contents/web_contents_view_aura.cc
@@ -40,6 +40,7 @@
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/drag_drop_client.h"
 #include "ui/aura/client/drag_drop_delegate.h"
+#include "ui/aura/env.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/root_window_observer.h"
 #include "ui/aura/window.h"
@@ -1139,6 +1140,7 @@ void WebContentsViewAura::CreateView(
   // if the bookmark bar is not shown and you create a new tab). The right
   // value is set shortly after this, so its safe to ignore.
 
+  aura::Env::CreateInstance();
   window_.reset(new aura::Window(this));
   window_->set_owned_by_parent(false);
   window_->SetType(aura::client::WINDOW_TYPE_CONTROL);