Get drag and drop working for win aura.

ui/views/widget/desktop_aura/desktop_native_widget_aura.cc

Index: ui/views/widget/desktop_aura/desktop_native_widget_aura.cc
===================================================================
--- ui/views/widget/desktop_aura/desktop_native_widget_aura.cc	(revision 171535)
+++ ui/views/widget/desktop_aura/desktop_native_widget_aura.cc	(working copy)
@@ -15,9 +15,12 @@
 #include "ui/compositor/layer.h"
 #include "ui/gfx/canvas.h"
 #include "ui/native_theme/native_theme.h"
+#include "ui/views/drag_utils.h"
 #include "ui/views/ime/input_method.h"
 #include "ui/views/widget/desktop_aura/desktop_root_window_host.h"
+#include "ui/views/widget/drop_helper.h"
 #include "ui/views/widget/native_widget_aura_window_observer.h"
+#include "ui/views/widget/root_view.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_aura_utils.h"
 
@@ -111,6 +114,9 @@
       desktop_root_window_host_->Init(window_, params));
   stacking_client_.reset(
       new DesktopNativeWidgetAuraStackingClient(root_window_.get()));
+  drop_helper_.reset(new DropHelper(
+      static_cast<internal::RootView*>(GetWidget()->GetRootView())));
+  aura::client::SetDragDropDelegate(window_, this);
 
   aura::client::SetActivationDelegate(window_, this);
 }
@@ -371,11 +377,13 @@
   return false;
 }
 
-void DesktopNativeWidgetAura::RunShellDrag(View* view,
+void DesktopNativeWidgetAura::RunShellDrag(
+    View* view,
                             const ui::OSExchangeData& data,
                             const gfx::Point& location,
                             int operation,
                             ui::DragDropTypes::DragEventSource source) {
+  views::RunShellDrag(window_, data, location, operation, source);
 }
 
 void DesktopNativeWidgetAura::SchedulePaintInRect(const gfx::Rect& rect) {
@@ -597,4 +605,31 @@
     GetWidget()->non_client_view()->SchedulePaint();
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// DesktopNativeWidgetAura, aura::WindowDragDropDelegate implementation:
+
+void DesktopNativeWidgetAura::OnDragEntered(const ui::DropTargetEvent& event) {
+  DCHECK(drop_helper_.get() != NULL);
+  last_drop_operation_ = drop_helper_->OnDragOver(event.data(),
+      event.location(), event.source_operations());
+}
+
+int DesktopNativeWidgetAura::OnDragUpdated(const ui::DropTargetEvent& event) {
+  DCHECK(drop_helper_.get() != NULL);
+  last_drop_operation_ = drop_helper_->OnDragOver(event.data(),
+      event.location(), event.source_operations());
+  return last_drop_operation_;
+}
+
+void DesktopNativeWidgetAura::OnDragExited() {
+  DCHECK(drop_helper_.get() != NULL);
+  drop_helper_->OnDragExit();
+}
+
+int DesktopNativeWidgetAura::OnPerformDrop(const ui::DropTargetEvent& event) {
+  DCHECK(drop_helper_.get() != NULL);
+  return drop_helper_->OnDrop(event.data(), event.location(),
+      last_drop_operation_);
+}
+
 }  // namespace views