Change panels to be able to turn off autoresize.

content/browser/renderer_host/render_view_host.cc

Index: content/browser/renderer_host/render_view_host.cc
diff --git a/content/browser/renderer_host/render_view_host.cc b/content/browser/renderer_host/render_view_host.cc
index 8d951e1d1c11392a3ba3cf14366ca885a37347ef..e28ee0259b0ede15e80eb35e9706027175d6b7e1 100644
--- a/content/browser/renderer_host/render_view_host.cc
+++ b/content/browser/renderer_host/render_view_host.cc
@@ -1108,7 +1108,7 @@ void RenderViewHost::OnMsgDidContentsPreferredSizeChange(
 }
 
 void RenderViewHost::OnRenderAutoResized(const gfx::Size& new_size) {
-  delegate_->UpdatePreferredSize(new_size);
+  delegate_->ResizeDueToAutoResize(new_size);
 }
 
 void RenderViewHost::OnMsgDidChangeScrollbarsForMainFrame(
@@ -1432,6 +1432,11 @@ void RenderViewHost::EnableAutoResize(const gfx::Size& min_size,
   Send(new ViewMsg_EnableAutoResize(routing_id(), min_size, max_size));
 }
 
+void RenderViewHost::DisableAutoResize(const gfx::Size& new_size) {
+  SetShouldAutoResize(false);
+  Send(new ViewMsg_DisableAutoResize(routing_id(), new_size));
+}
+
 void RenderViewHost::ExecuteCustomContextMenuCommand(
     int action, const content::CustomContextMenuContext& context) {
   Send(new ViewMsg_CustomContextMenuAction(routing_id(), context, action));