Fixes two bugs related to constrained windows:

chrome/browser/ui/views/constrained_web_dialog_delegate_views.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/webui/constrained_web_dialog_delegate_base.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
 #include "chrome/browser/ui/views/constrained_window_views.h"
@@ skipping 125 matching lines @@
     DCHECK_EQ(ui::VKEY_ESCAPE, accelerator.key_code());
     window()->CloseConstrainedWindow();
     return true;
   }
   virtual gfx::Size GetPreferredSize() OVERRIDE {
     gfx::Size size;
     if (!impl_->closed_via_webui())
       GetWebDialogDelegate()->GetDialogSize(&size);
     return size;
   }
+  virtual gfx::Size GetMinimumSize() OVERRIDE {
+    // Return an empty size so that we can be made smaller.
+    return gfx::Size();
+  }
 
  private:
   scoped_ptr<ConstrainedWebDialogDelegateViews> impl_;
 
   DISALLOW_COPY_AND_ASSIGN(ConstrainedWebDialogDelegateViewViews);
 };
 
 ConstrainedWebDialogDelegateViewViews::ConstrainedWebDialogDelegateViewViews(
     Profile* profile,
     WebDialogDelegate* delegate,
@@ skipping 18 matching lines @@
     WebDialogDelegate* delegate,
     WebDialogWebContentsDelegate* tab_delegate,
     TabContents* container) {
   ConstrainedWebDialogDelegateViewViews* constrained_delegate =
       new ConstrainedWebDialogDelegateViewViews(profile, delegate, tab_delegate);
   ConstrainedWindow* constrained_window =
       new ConstrainedWindowViews(container, constrained_delegate);
   constrained_delegate->set_window(constrained_window);
   return constrained_delegate;
 }