Get drag and drop working for win aura.

ui/views/controls/webview/webview.cc

Index: ui/views/controls/webview/webview.cc
===================================================================
--- ui/views/controls/webview/webview.cc	(revision 171535)
+++ ui/views/controls/webview/webview.cc	(working copy)
@@ -13,6 +13,7 @@
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_contents_view.h"
 #include "ipc/ipc_message.h"
 #include "ui/base/accessibility/accessibility_types.h"
 #include "ui/base/accessibility/accessible_view_state.h"
@@ -21,6 +22,11 @@
 #include "ui/views/focus/focus_manager.h"
 #include "ui/views/views_delegate.h"
 
+#if defined(USE_AURA)
+#include "ui/aura/client/drag_drop_client.h"
+#include "ui/aura/client/drag_drop_delegate.h"
+#endif
+
 namespace views {
 
 // static
@@ -150,6 +156,47 @@
     return preferred_size_;
 }
 
+#if defined(USE_AURA)
+bool WebView::CanDrop(const ui::OSExchangeData& data) {
+  return true;
+}
+
+void WebView::OnDragEntered(const ui::DropTargetEvent& event) {
+  aura::Window* window = web_contents_->GetView()->GetContentNativeView();
+  aura::client::DragDropDelegate* dnd_delegate =
+      aura::client::GetDragDropDelegate(window);
+  if (dnd_delegate)
+    dnd_delegate->OnDragEntered(event);
+}
+
+int WebView::OnDragUpdated(const ui::DropTargetEvent& event) {
+  aura::Window* window = web_contents_->GetView()->GetContentNativeView();
+  aura::client::DragDropDelegate* dnd_delegate =
+      aura::client::GetDragDropDelegate(window);
+  if (dnd_delegate)
+    return dnd_delegate->OnDragUpdated(event);
+  return ui::DragDropTypes::DRAG_NONE;
+}
+
+void WebView::OnDragExited() {
+  aura::Window* window = web_contents_->GetView()->GetContentNativeView();
+  aura::client::DragDropDelegate* dnd_delegate =
+      aura::client::GetDragDropDelegate(window);
+  if (dnd_delegate)
+    dnd_delegate->OnDragExited();
+}
+
+int WebView::OnPerformDrop(const ui::DropTargetEvent& event) {
+  aura::Window* window = web_contents_->GetView()->GetContentNativeView();
+  aura::client::DragDropDelegate* dnd_delegate =
+      aura::client::GetDragDropDelegate(window);
+  if (dnd_delegate)
+    return dnd_delegate->OnPerformDrop(event);
+  return ui::DragDropTypes::DRAG_NONE;
+}
+
+#endif
+
 ////////////////////////////////////////////////////////////////////////////////
 // WebView, content::NotificationObserver implementation: