Panels test cleanup.

chrome/browser/ui/panels/panel.cc

 // Copyright (c) 2012 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 "base/message_loop.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
@@ skipping 488 matching lines @@
 
 bool Panel::IsFullscreen() const {
   return false;
 }
 
 void Panel::OnContentsAutoResized(const gfx::Size& new_content_size) {
   DCHECK(auto_resizable_);
   if (!panel_strip_)
     return;
 
-  panel_strip_->ResizePanelWindow(
-      this,
-      native_panel_->WindowSizeFromContentSize(new_content_size));
+  gfx::Size new_window_size =
+      native_panel_->WindowSizeFromContentSize(new_content_size);
+
+  // Ignore content auto resizes until window frame size is known.
+  // This reduces extra resizes when panel is first shown.
+  // After window frame size is known, it will trigger another content
+  // auto resize.
+  if (new_content_size == new_window_size)
+    return;
+
+  panel_strip_->ResizePanelWindow(this, new_window_size);
 }
 
 void Panel::OnWindowResizedByMouse(const gfx::Rect& new_bounds) {
   if (panel_strip_)
     panel_strip_->OnPanelResizedByMouse(this, new_bounds);
 }
 
 void Panel::EnableWebContentsAutoResize(content::WebContents* web_contents) {
   DCHECK(web_contents);
   ConfigureAutoResize(web_contents);
@@ skipping 238 matching lines @@
 
 void Panel::LoadingStateChanged(bool is_loading) {
   command_updater_.UpdateCommandEnabled(IDC_STOP, is_loading);
   native_panel_->UpdatePanelLoadingAnimations(is_loading);
   UpdateTitleBar();
 }
 
 void Panel::WebContentsFocused(content::WebContents* contents) {
   native_panel_->PanelWebContentsFocused(contents);
 }