Add autoresize capability to chromium.

chrome/browser/ui/panels/panel.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/panels/panel.h"
 
 #include "base/logging.h"
 #include "chrome/browser/extensions/extension_prefs.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 570 matching lines @@
   }
 }
 
 void Panel::EnableTabContentsAutoResize(TabContents* tab_contents) {
   DCHECK(tab_contents);
   RenderViewHost* render_view_host = tab_contents->render_view_host();
   if (render_view_host)
     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,
       content::NOTIFICATION_TAB_CONTENTS_SWAPPED,
       content::Source<TabContents>(tab_contents));
 }
 
 void Panel::Observe(int type,
                     const content::NotificationSource& source,
                     const content::NotificationDetails& details) {
   if (auto_resizable_) {
     DCHECK_EQ(type, content::NOTIFICATION_TAB_CONTENTS_SWAPPED);
     RenderViewHost* render_view_host =
         content::Source<TabContents>(source).ptr()->render_view_host();
     if (render_view_host)
       EnableRendererAutoResize(render_view_host);
   }
 }
 
 RenderViewHost* Panel::GetRenderViewHost() const {
   TabContents* tab_contents = browser()->GetSelectedTabContents();
   if (!tab_contents)
     return NULL;
   return tab_contents->render_view_host();
 }
 
 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_));
 }
 
 void Panel::OnWindowSizeAvailable() {
   if (auto_resizable_) {
     RenderViewHost* render_view_host = GetRenderViewHost();
     if (render_view_host)
-      RequestRenderViewHostToDisableScrollbars(render_view_host);
+      EnableRendererAutoResize(render_view_host);
   }
 }
 
 void Panel::DestroyBrowser() {
   native_panel_->DestroyPanelBrowser();
 }