Adds ability to specify how aura::Env is created in content

content/public/common/main_function_params.h

Index: content/public/common/main_function_params.h
diff --git a/content/public/common/main_function_params.h b/content/public/common/main_function_params.h
index 913e9b26f39731d27eeb8969b95d9f6cc68999c5..dac2991356f87b93856c5af583a6699b9c661029 100644
--- a/content/public/common/main_function_params.h
+++ b/content/public/common/main_function_params.h
@@ -25,6 +25,10 @@ class ScopedNSAutoreleasePool;
 }
 #endif
 
+#if defined(USE_AURA)
+#include "ui/aura/env.h"
+#endif
+
 namespace content {
 
 struct MainFunctionParams {
@@ -50,6 +54,10 @@ struct MainFunctionParams {
   bool zygote_child;
 #endif
 
+#if defined(USE_AURA)
+  aura::Env::Mode env_mode = aura::Env::Mode::LOCAL;
+#endif
+
   // Used by InProcessBrowserTest. If non-null BrowserMain schedules this
   // task to run on the MessageLoop and BrowserInit is not invoked.
   base::Closure* ui_task;