Some fixes to panel support on Windows:

chrome/browser/ui/panels/panel_browser_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_view.h"
 
 #include "base/logging.h"
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_browser_frame_view.h"
 #include "chrome/browser/ui/panels/panel_manager.h"
 #include "chrome/browser/ui/panels/panel_mouse_watcher_win.h"
 #include "chrome/browser/ui/views/frame/browser_frame.h"
 #include "grit/chromium_strings.h"
 #include "ui/base/animation/slide_animation.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "views/widget/widget.h"
 
 namespace {
 // This value is experimental and subjective.
-const int kSetBoundsAnimationMs = 200;
-
-// The panel can be fully minimized to 3-pixel lines.
-const int kFullyMinimizedHeight = 3;
+const int kSetBoundsAnimationMs = 180;
 
 // Delay before click-to-minimize is allowed after the attention has been
 // cleared.
 const base::TimeDelta kSuspendMinimizeOnClickIntervalMs =
     base::TimeDelta::FromMilliseconds(500);
 }
 
 NativePanel* Panel::CreateNativePanel(Browser* browser, Panel* panel,
                                       const gfx::Rect& bounds) {
   PanelBrowserView* view = new PanelBrowserView(browser, panel, bounds);
@@ skipping 155 matching lines @@
     Panel::ExpansionState expansion_state) {
   int height;
   switch (expansion_state) {
     case Panel::EXPANDED:
       height = original_height_;
       break;
     case Panel::TITLE_ONLY:
       height = GetFrameView()->NonClientTopBorderHeight();
       break;
     case Panel::MINIMIZED:
-      height = kFullyMinimizedHeight;
+      height = PanelBrowserFrameView::MinimizedPanelHeight();
 
       // Start the mouse watcher so that we can bring up the minimized panels.
       // TODO(jianli): Need to support mouse watching in ChromeOS.
 #if defined(OS_WIN)
       EnsureMouseWatcherStarted();
 #endif
       break;
     default:
       NOTREACHED();
       height = original_height_;
@@ skipping 139 matching lines @@
   }
 
   Panel::ExpansionState new_expansion_state =
     (panel_->expansion_state() != Panel::EXPANDED) ? Panel::EXPANDED
                                                    : Panel::MINIMIZED;
   panel_->SetExpansionState(new_expansion_state);
   return true;
 }
 
 bool PanelBrowserView::OnTitlebarMouseCaptureLost() {
-  return EndDragging(true);
+  if (mouse_dragging_)
+    return EndDragging(true);
+  return true;
 }
 
 bool PanelBrowserView::EndDragging(bool cancelled) {
   // Only handle clicks that started in our window.
   if (!mouse_pressed_)
     return false;
   mouse_pressed_ = false;
 
   if (!mouse_dragging_)
     cancelled = true;
@@ skipping 44 matching lines @@
       current_bounds.x() + delta_x, current_bounds.y() + delta_y));
 }
 
 void NativePanelTestingWin::CancelDragTitlebar() {
   panel_browser_view_->OnTitlebarMouseCaptureLost();
 }
 
 void NativePanelTestingWin::FinishDragTitlebar() {
   panel_browser_view_->OnTitlebarMouseReleased();
 }