Separate RenderView from RenderWidget, part 1: inheritance.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index ee8b839497eff44ee170dfa30382af1c80471f49..f001e7d2ae271fd4662145d8dae8999b644b0357 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -2260,6 +2260,10 @@ bool RenderViewImpl::Send(IPC::Message* message) {
   return RenderWidget::Send(message);
 }
 
+RenderWidget* RenderViewImpl::GetWidget() const {
+  return const_cast<RenderWidget*>(static_cast<const RenderWidget*>(this));

[dcheng, 2016/02/23 23:05:35]

Is it worth importing that giant comment from render_frame_impl_browsertest.cc?

[Avi (use Gerrit), 2016/02/26 20:02:20]

No, because it doesn't apply.

Those casts were to move up and down the tree because of the multiple bases.
This is a simple upcast, made complicated because we need to remove the const
and then go up.

+}
+
 RenderFrameImpl* RenderViewImpl::GetMainRenderFrame() {
   return main_render_frame_;
 }