Support minimizing the panel into 3-pixel line on Windows. Also support bringing up/down the titl...

chrome/browser/ui/panels/panel_browser_frame_view.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_browser_frame_view.h"
 
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/themes/theme_service.h"
 #include "chrome/browser/ui/panels/panel.h"
@@ skipping 308 matching lines @@
   UpdateControlStyles(browser_view_->focused() ?
                       PAINT_AS_ACTIVE : PAINT_AS_INACTIVE);
   PaintFrameBorder(canvas);
   PaintClientEdge(canvas);
 }
 
 void PanelBrowserFrameView::OnThemeChanged() {
   LoadImageResources();
 }
 
+gfx::Size PanelBrowserFrameView::GetMinimumSize() {
+  // This makes the panel be able to shrink to very small, like 3-pixel lines.
+  // Since the panel cannot be resized by the user, we do not need to enforce
+  // the minimum size.
+  return gfx::Size();
+}
+
 void PanelBrowserFrameView::Layout() {
   // Layout the close button.
   gfx::Size close_button_size = close_button_->GetPreferredSize();
   close_button_->SetBounds(
       width() - kFrameBorderThickness - kButtonSpacing -
           close_button_size.width(),
       (NonClientTopBorderHeight() - close_button_size.height()) / 2,
       close_button_size.width(),
       close_button_size.height());
 
@@ skipping 331 matching lines @@
   settings_menu_contents_->AddItem(
       COMMAND_DISABLE, l10n_util::GetStringUTF16(IDS_EXTENSIONS_DISABLE));
   settings_menu_contents_->AddItem(
       COMMAND_UNINSTALL, l10n_util::GetStringUTF16(IDS_EXTENSIONS_UNINSTALL));
   settings_menu_contents_->AddSeparator();
   settings_menu_contents_->AddItem(
       COMMAND_MANAGE, l10n_util::GetStringUTF16(IDS_MANAGE_EXTENSIONS));
 
   settings_menu_.reset(new views::Menu2(settings_menu_contents_.get()));
 }