Reduce minimum size of Panels to allow 1-text-line tight autosize.

chrome/browser/ui/panels/panel_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_PANELS_PANEL_MANAGER_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_MANAGER_H_
 #pragma once
 
 #include <vector>
 #include "base/basictypes.h"
@@ skipping 100 matching lines @@
   }
 
   // Tests should disable mouse watching if mouse movements will be simulated.
   void disable_mouse_watching() {
     mouse_watching_disabled_ = true;
   }
 #endif
 
  private:
   friend struct base::DefaultLazyInstanceTraits<PanelManager>;
+  FRIEND_TEST_ALL_PREFIXES(PanelBrowserTest, SizeClamping);
 
   enum TitlebarAction {
     NO_ACTION,
     BRING_UP,
     BRING_DOWN
   };
 
   PanelManager();
   virtual ~PanelManager();
 
@@ skipping 83 matching lines @@
 
   // Whether or not bounds will be updated when the preferred content size is
   // changed. The testing code could set this flag to false so that other tests
   // will not be affected.
   bool auto_sizing_enabled_;
 
   bool mouse_watching_disabled_;  // For tests to simulate mouse movements.
 
   static const int kPanelsHorizontalSpacing = 4;
 
-  // Minimum width and height of a panel.
-  // Note: The minimum size of a widget (see widget.cc) is fixed to 100x100.
-  // TODO(jianli): Need to fix this to support smaller panel.
-  // http://crbug.com/102708
+  // Absolute minimum width and height for panels, including non-client area.
+  // Should only be big enough to accomodate a close button on the reasonably
+  // recognisable titlebar.
   static const int kPanelMinWidth = 100;
-  static const int kPanelMinHeight = 100;
+  static const int kPanelMinHeight = 20;
 
   DISALLOW_COPY_AND_ASSIGN(PanelManager);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_MANAGER_H_