Avoid locking up the web view when starting a drag

We currently don't have an implementation for drag and drop and
we need to explicitly call SystemDragEnded to avoid leaving the
render process in an inconsisten state.

See http://crbug.com/157134

Change-Id: I52220602d4e4832d11ef601589a588c91bb81285
Reviewed-by: Andras Becsi <andras.becsi@digia.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/core/web_contents_view_qt.cpp b/src/core/web_contents_view_qt.cpp
index 8fdcf4679..2ab5b483c 100644
--- a/src/core/web_contents_view_qt.cpp
+++ b/src/core/web_contents_view_qt.cpp
@@ -131,6 +131,17 @@ void WebContentsViewQt::ShowContextMenu(const content::ContextMenuParams &params
     m_client->contextMenuRequested(contextMenuData);
 }
 
+void WebContentsViewQt::StartDragging(const content::DropData& drop_data, WebKit::WebDragOperationsMask allowed_ops, const gfx::ImageSkia& image, const gfx::Vector2d& image_offset, const content::DragEventSourceInfo& event_info)
+{
+    Q_UNUSED(drop_data);
+    Q_UNUSED(allowed_ops);
+    Q_UNUSED(image);
+    Q_UNUSED(image_offset);
+    Q_UNUSED(event_info);
+    // Tell the renderer to cancel the drag, see StartDragging's declaration in render_view_host_delegate_view.h for info.
+    m_webContents->SystemDragEnded();
+}
+
 void WebContentsViewQt::TakeFocus(bool reverse)
 {
     m_client->passOnFocus(reverse);