Get drag and drop working for win aura.

ui/views/widget/desktop_aura/desktop_root_window_host_win.cc

Index: ui/views/widget/desktop_aura/desktop_root_window_host_win.cc
===================================================================
--- ui/views/widget/desktop_aura/desktop_root_window_host_win.cc	(revision 171535)
+++ ui/views/widget/desktop_aura/desktop_root_window_host_win.cc	(working copy)
@@ -25,8 +25,10 @@
 #include "ui/views/widget/desktop_aura/desktop_activation_client.h"
 #include "ui/views/widget/desktop_aura/desktop_cursor_client.h"
 #include "ui/views/widget/desktop_aura/desktop_dispatcher_client.h"
+#include "ui/views/widget/desktop_aura/desktop_drag_drop_client_win.h"
 #include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
 #include "ui/views/widget/desktop_aura/desktop_screen_position_client.h"
+#include "ui/views/widget/root_view.h"
 #include "ui/views/widget/widget_delegate.h"
 #include "ui/views/widget/widget_hwnd_utils.h"
 #include "ui/views/win/fullscreen_handler.h"
@@ -129,11 +131,14 @@
   cursor_client_.reset(new DesktopCursorClient(root_window_));
   aura::client::SetCursorClient(root_window_, cursor_client_.get());
 
-
   position_client_.reset(new DesktopScreenPositionClient());
   aura::client::SetScreenPositionClient(root_window_,
                                         position_client_.get());
 
+  drag_drop_client_.reset(new DesktopDragDropClientWin(root_window_,
+                                                       GetHWND()));
+  aura::client::SetDragDropClient(root_window_, drag_drop_client_.get());
+
   // CEF sets focus to the window the user clicks down on.
   // TODO(beng): see if we can't do this some other way. CEF seems a heavy-
   //             handed way of accomplishing focus.
@@ -399,7 +404,9 @@
 }
 
 gfx::Point DesktopRootWindowHostWin::GetLocationOnNativeScreen() const {
-  return gfx::Point(1, 1);
+  RECT r;
+  GetWindowRect(GetHWND(), &r);
+  return gfx::Point(r.left, r.top);
 }
 
 void DesktopRootWindowHostWin::SetCapture() {
@@ -614,11 +621,11 @@
 
   // 1. Window property association
   // 2. MouseWheel.
-  // 3. Drop target.
-  // 4. Tooltip Manager.
+  // 3. Tooltip Manager.
 }
 
 void DesktopRootWindowHostWin::HandleDestroying() {
+  drag_drop_client_->OnNativeWidgetDestroying(GetHWND());
   native_widget_delegate_->OnNativeWidgetDestroying();
 }