MonitorManager to manage multiple monitors.

ui/aura/env.cc

Index: ui/aura/env.cc
diff --git a/ui/aura/env.cc b/ui/aura/env.cc
index 30b8b38ffc8951fe0f8329e1f19719cab72105d1..006400f9ebe625d5b0d3602a9776aba799e3dbd5 100644
--- a/ui/aura/env.cc
+++ b/ui/aura/env.cc
@@ -4,6 +4,7 @@
 
 #include "ui/aura/env.h"
 #include "ui/aura/env_observer.h"
+#include "ui/aura/monitor_manager.h"
 #include "ui/aura/root_window_host.h"
 #include "ui/aura/window.h"
 
@@ -15,7 +16,11 @@ Env* Env::instance_ = NULL;
 ////////////////////////////////////////////////////////////////////////////////
 // Env, public:
 
-Env::Env() : mouse_button_flags_(0), stacking_client_(NULL) {
+Env::Env()
+    : mouse_button_flags_(0),
+      stacking_client_(NULL),
+      monitor_manager_(NULL)
+{
 #if !defined(OS_MACOSX)
   dispatcher_.reset(CreateDispatcher());
 #endif
@@ -44,6 +49,10 @@ void Env::RemoveObserver(EnvObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
+void Env::SetMonitorManager(MonitorManager* monitor_manager) {
+  monitor_manager_.reset(monitor_manager);
+}
+
 #if !defined(OS_MACOSX)
 MessageLoop::Dispatcher* Env::GetDispatcher() {
   return dispatcher_.get();