Propagate auto-resize viewport values to OOPIF processes

content/browser/renderer_host/render_view_host_impl.cc

Index: content/browser/renderer_host/render_view_host_impl.cc
diff --git a/content/browser/renderer_host/render_view_host_impl.cc b/content/browser/renderer_host/render_view_host_impl.cc
index df1962ab320d770de1b74f63d194e66a63cc5fc0..c8a1839248a9c3f5958b01dc65e8d74faa5d9659 100644
--- a/content/browser/renderer_host/render_view_host_impl.cc
+++ b/content/browser/renderer_host/render_view_host_impl.cc
@@ -933,6 +933,12 @@ void RenderViewHostImpl::DisableAutoResize(const gfx::Size& new_size) {
   Send(new ViewMsg_DisableAutoResize(GetRoutingID(), new_size));
   if (!new_size.IsEmpty())
     GetWidget()->GetView()->SetSize(new_size);
+  // This clears the cached value in the WebContents, so that OOPIFs will
+  // stop using it.
+  if (GetWidget()->delegate()) {
+    GetWidget()->delegate()->ResizeDueToAutoResize(GetWidget(),
+                                                   gfx::Size(0, 0));

[alexmos, 2017/06/02 17:03:18]

optional: can just use "gfx::Size()" here

[kenrb, 2017/06/02 17:23:27]

Yes, but I had to remove this call anyway because it broke a webview API test.
In the new PS I have added a separate call on the delegate interface, because we
don't want this to generate a resize notification to observers.

+  }
 }
 
 void RenderViewHostImpl::ExecuteMediaPlayerActionAtLocation(