Add autoresize capability to chromium.

chrome/browser/ui/panels/panel.cc

Index: chrome/browser/ui/panels/panel.cc
diff --git a/chrome/browser/ui/panels/panel.cc b/chrome/browser/ui/panels/panel.cc
index 5bcab6c969788442fbc6d0a98affc2d27d6fea95..808da73636bd61674ba59c5de61e55de7171479c 100644
--- a/chrome/browser/ui/panels/panel.cc
+++ b/chrome/browser/ui/panels/panel.cc
@@ -588,8 +588,7 @@ void Panel::EnableTabContentsAutoResize(TabContents* tab_contents) {
     EnableRendererAutoResize(render_view_host);
 
   // We also need to know when the render view host changes in order
-  // to turn on preferred size changed notifications in the new
-  // render view host.
+  // to turn on autosize notifications in the new render view host.
   registrar_.RemoveAll();  // Stop notifications for previous contents, if any.
   registrar_.Add(
       this,
@@ -619,15 +618,8 @@ RenderViewHost* Panel::GetRenderViewHost() const {
 void Panel::EnableRendererAutoResize(RenderViewHost* render_view_host) {
   DCHECK(auto_resizable_);
   DCHECK(render_view_host);
-  render_view_host->EnablePreferredSizeMode();
-  RequestRenderViewHostToDisableScrollbars(render_view_host);
-}
-
-void Panel::RequestRenderViewHostToDisableScrollbars(
-    RenderViewHost* render_view_host) {
-  DCHECK(auto_resizable_);
-  DCHECK(render_view_host);
-  render_view_host->DisableScrollbarsForThreshold(
+  render_view_host->EnableAutoResize(
+      min_size_,
       native_panel_->ContentSizeFromWindowSize(max_size_));
 }
 
@@ -635,7 +627,7 @@ void Panel::OnWindowSizeAvailable() {
   if (auto_resizable_) {
     RenderViewHost* render_view_host = GetRenderViewHost();
     if (render_view_host)
-      RequestRenderViewHostToDisableScrollbars(render_view_host);
+      EnableRendererAutoResize(render_view_host);
   }
 }