Drag-and-drop: updateDragCursor

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index aa54face8ed21d62c431223d4392dcfffc7d96a4..8ccf85168cef14ce918b55534c19559abd18bb2d 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -100,6 +100,7 @@
 using base::Time;
 using base::TimeDelta;
 using base::TimeTicks;
+using blink::WebDragOperation;
 using blink::WebDragOperationsMask;
 using blink::WebGestureEvent;
 using blink::WebInputEvent;
@@ -512,6 +513,9 @@ bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
   if (owner_delegate_ && owner_delegate_->OnMessageReceived(msg))
     return true;
 
+  if (delegate_ && delegate_->OnMessageReceived(this, msg))
+    return true;
+
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostImpl, msg)
     IPC_MESSAGE_HANDLER(FrameHostMsg_RenderProcessGone, OnRenderProcessGone)
@@ -545,6 +549,7 @@ bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
                         OnForwardCompositorProto)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetNeedsBeginFrames, OnSetNeedsBeginFrames)
     IPC_MESSAGE_HANDLER(DragHostMsg_StartDragging, OnStartDragging)
+    IPC_MESSAGE_HANDLER(DragHostMsg_UpdateDragCursor, OnUpdateDragCursor)

[ncarter (slow), 2016/11/14 20:23:45]

Seems like this message is actually handled by a WebContentsObserver in some
cases, but it's expecting it to arrive via the RFH:

https://cs.chromium.org/chromium/src/content/browser/browser_plugin/browser_p...

     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -1514,6 +1519,12 @@ void RenderWidgetHostImpl::OnStartDragging(
                       bitmap_offset_in_dip, event_info);
 }
 
+void RenderWidgetHostImpl::OnUpdateDragCursor(WebDragOperation current_op) {
+  RenderViewHostDelegateView* view = delegate_->GetDelegateView();
+  if (view)
+    view->UpdateDragCursor(current_op);
+}
+
 void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
                                           int exit_code) {
   if (!renderer_initialized_)