Drag-and-drop: Target drag messages to specific RenderWidgets.

content/browser/renderer_host/render_view_host_delegate_view.h

Index: content/browser/renderer_host/render_view_host_delegate_view.h
diff --git a/content/browser/renderer_host/render_view_host_delegate_view.h b/content/browser/renderer_host/render_view_host_delegate_view.h
index 63c5a3580edfd1a7f6c1882637348b7787ed9887..f853c0aa34b019a2dc5551c7bdd88ae960af8278 100644
--- a/content/browser/renderer_host/render_view_host_delegate_view.h
+++ b/content/browser/renderer_host/render_view_host_delegate_view.h
@@ -21,6 +21,7 @@ class Vector2d;
 
 namespace content {
 class RenderFrameHost;
+class RenderWidgetHost;
 struct ContextMenuParams;
 struct DropData;
 struct MenuItem;
@@ -44,7 +45,8 @@ class CONTENT_EXPORT RenderViewHostDelegateView {
                              blink::WebDragOperationsMask allowed_ops,
                              const gfx::ImageSkia& image,
                              const gfx::Vector2d& image_offset,
-                             const DragEventSourceInfo& event_info) {}
+                             const DragEventSourceInfo& event_info,
+                             RenderWidgetHost* source_rwh) {}

[ncarter (slow), 2016/11/16 22:31:23]

This could be a RenderWidgetHostImpl, and I think it'll let us get rid of a cast
inside of the aura version if we do. However, it's also okay as a
RenderWidgetHost if you're in a rush to land this.

[paulmeyer, 2016/11/16 22:44:21]

I wasn't sure if it was okay to be impl here. I will change it.

 
   // The page wants to update the mouse cursor during a drag & drop operation.
   // |operation| describes the current operation (none, move, copy, link.)