Drag-and-drop: Move startDrag out of WebView/RenderView.

content/browser/renderer_host/render_widget_host_delegate.cc

Index: content/browser/renderer_host/render_widget_host_delegate.cc
diff --git a/content/browser/renderer_host/render_widget_host_delegate.cc b/content/browser/renderer_host/render_widget_host_delegate.cc
index 662d50b9d2acb8d3accba3f7c71898ee699f35fb..a9a0b58b7864fc80befe7b2da278e46313641430 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.cc
+++ b/content/browser/renderer_host/render_widget_host_delegate.cc
@@ -72,4 +72,8 @@ bool RenderWidgetHostDelegate::IsHidden() {
   return false;
 }
 
+RenderViewHostImpl* RenderWidgetHostDelegate::GetRenderViewHost() const {
+  return nullptr;

[dcheng, 2016/11/03 21:22:52]

Can you help me understand what this is for?

[paulmeyer, 2016/11/04 19:01:17]

This allows RenderWidgetHostImpl to access it's RenderViewHostImpl via
WebContentsImpl::GetRenderViewHost().

[dcheng, 2016/11/07 21:11:00]

Is this something we'll be able to clean up in followup patches?

[paulmeyer, 2016/11/07 22:18:12]

It could be cleaned up if drag-and-drop code is moved out of
WebContentsViewAura, though I think that would only be done as a clean-up
refactor after getting drag-and-drop working in the first place.

+}
+
 }  // namespace content