Move ash specific cursor code to CursorManager.

ui/aura/root_window.cc

Index: ui/aura/root_window.cc
diff --git a/ui/aura/root_window.cc b/ui/aura/root_window.cc
index 9c9bddebb8731c39e52dec1d56714fad2ca07004..bfc910998e4b32488bf501400a930352acfe9f5b 100644
--- a/ui/aura/root_window.cc
+++ b/ui/aura/root_window.cc
@@ -15,7 +15,6 @@
 #include "ui/aura/aura_switches.h"
 #include "ui/aura/client/activation_client.h"
 #include "ui/aura/client/capture_client.h"
-#include "ui/aura/client/drag_drop_client.h"
 #include "ui/aura/client/event_client.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/display_manager.h"
@@ -104,8 +103,6 @@ void CompositorLock::CancelLock() {
   root_window_ = NULL;
 }
 
-bool RootWindow::hide_host_cursor_ = false;
-
 ////////////////////////////////////////////////////////////////////////////////
 // RootWindow, public:
 
@@ -230,11 +227,6 @@ gfx::Point RootWindow::GetHostOrigin() const {
 }
 
 void RootWindow::SetCursor(gfx::NativeCursor cursor) {
-  // If a drag is in progress, the DragDropClient should override the cursor.
-  client::DragDropClient* dnd_client = client::GetDragDropClient(this);
-  if (dnd_client && dnd_client->IsDragDropInProgress())
-    cursor = dnd_client->GetDragCursor();
-
   last_cursor_ = cursor;
   // A lot of code seems to depend on NULL cursors actually showing an arrow,
   // so just pass everything along to the host.