Prevent frameless packaged apps from being resized to 0x0 on CrOS

apps/ui/views/app_window_frame_view.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 "apps/ui/views/app_window_frame_view.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "extensions/browser/app_window/native_app_window.h"
 #include "extensions/common/draggable_region.h"
 #include "grit/theme_resources.h"
@@ skipping 300 matching lines @@
   path.lineTo(width(), kCaptionHeight);
   path.lineTo(0, kCaptionHeight);
   path.close();
   canvas->DrawPath(path, paint);
 }
 
 const char* AppWindowFrameView::GetClassName() const { return kViewClassName; }
 
 gfx::Size AppWindowFrameView::GetMinimumSize() const {
   gfx::Size min_size = widget_->client_view()->GetMinimumSize();
-  if (!draw_frame_)
+  if (!draw_frame_) {
+    min_size.SetToMax(gfx::Size(1, 1));
     return min_size;
+  }
 
   // Ensure we can display the top of the caption area.
   gfx::Rect client_bounds = GetBoundsForClientView();
   min_size.Enlarge(0, client_bounds.y());
   // Ensure we have enough space for the window icon and buttons.  We allow
   // the title string to collapse to zero width.
   int closeButtonOffsetX = (kCaptionHeight - close_button_->height()) / 2;
   int header_width = close_button_->width() + closeButtonOffsetX * 2;
   if (header_width > min_size.width())
     min_size.set_width(header_width);
@@ skipping 58 matching lines @@
     restore_button_->SetImage(
         views::CustomButton::STATE_NORMAL,
         rb.GetNativeImageNamed(IDR_APP_WINDOW_RESTORE).ToImageSkia());
     minimize_button_->SetImage(
         views::CustomButton::STATE_NORMAL,
         rb.GetNativeImageNamed(IDR_APP_WINDOW_MINIMIZE).ToImageSkia());
   }
 }
 
 }  // namespace apps