Add CanMinimize to classes that implement WidgetDelegate::CanMaximize.

ash/frame/custom_frame_view_ash_unittest.cc

 // Copyright 2014 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 "ash/frame/custom_frame_view_ash.h"
 
 #include "ash/frame/caption_buttons/frame_caption_button.h"
 #include "ash/frame/caption_buttons/frame_caption_button_container_view.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 50 matching lines @@
     // Set this instance as the contents view so that the maximum and minimum
     // size constraints will be used.
     return this;
   }
 
   // views::WidgetDelegate:
   virtual bool CanMaximize() const OVERRIDE {
     return true;
   }
 
+  virtual bool CanMinimize() const OVERRIDE {
+    return true;
+  }
+
   void set_minimum_size(const gfx::Size& min_size) {
     minimum_size_ = min_size;
   }
 
   void set_maximum_size(const gfx::Size& max_size) {
     maximum_size_ = max_size;
   }
 
   const gfx::Rect& GetFrameCaptionButtonContainerViewBounds() {
     return custom_frame_view()->GetFrameCaptionButtonContainerViewForTest()->
@@ skipping 143 matching lines @@
   EXPECT_GT(initial.width(), maximize_mode_bounds.width());
   Shell::GetInstance()->maximize_mode_controller()->
       EnableMaximizeModeWindowManager(false);
   delegate->EndFrameCaptionButtonContainerViewAnimations();
   const gfx::Rect after_restore = delegate->
       GetFrameCaptionButtonContainerViewBounds();
   EXPECT_EQ(initial, after_restore);
 }
 
 }  // namespace ash