Reunite PanelStrip::AddPanel and its internals.

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 77 matching lines @@
     TabContents* tab_contents = browser()->GetSelectedTabContents();
     if (tab_contents)
       EnableTabContentsAutoResize(tab_contents);
   } else {
     browser()->tabstrip_model()->RemoveObserver(this);
     registrar_.RemoveAll();
   }
 }
 
 void Panel::SetSizeRange(const gfx::Size& min_size, const gfx::Size& max_size) {
+  if (min_size == min_size_ && max_size == max_size_)
+    return;
+
   DCHECK(min_size.width() <= max_size.width());
   DCHECK(min_size.height() <= max_size.height());
   min_size_ = min_size;
   max_size_ = max_size;
 
   // Need to update the renderer on the new size range.
   if (auto_resizable_) {
     RenderViewHost* render_view_host = GetRenderViewHost();
     if (render_view_host)
       RequestRenderViewHostToDisableScrollbars(render_view_host);
@@ skipping 527 matching lines @@
   if (auto_resizable_) {
     RenderViewHost* render_view_host = GetRenderViewHost();
     if (render_view_host)
       RequestRenderViewHostToDisableScrollbars(render_view_host);
   }
 }
 
 void Panel::DestroyBrowser() {
   native_panel_->DestroyPanelBrowser();
 }