Move SetCanHaveScrollbars method from WebFrame to WebLocalFrame.

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 301fc74f0f9783133b98628ae9bb3dde2ea8d8cd..62fa92bd61d066d6afea99aa16f2b757560e6dd9 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -2189,8 +2189,9 @@ void RenderViewImpl::OnResize(const ResizeParams& params) {
     webview()->HidePopups();
     if (send_preferred_size_changes_ &&
         webview()->MainFrame()->IsWebLocalFrame()) {
-      webview()->MainFrame()->SetCanHaveScrollbars(ShouldDisplayScrollbars(
-          params.new_size.width(), params.new_size.height()));
+      webview()->MainFrame()->ToWebLocalFrame()->SetCanHaveScrollbars(

[dcheng, 2017/06/02 16:29:37]

The downcast is a bit unfortunate but I don't have a better suggestion here =)

+          ShouldDisplayScrollbars(params.new_size.width(),
+                                  params.new_size.height()));
     }
     if (display_mode_ != params.display_mode) {
       display_mode_ = params.display_mode;