Wires up WorkspaceLayoutManager in mash

mash/wm/frame/non_client_frame_view_mash.cc

 // Copyright 2015 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 "mash/wm/frame/non_client_frame_view_mash.h"
 
 #include <algorithm>
 #include <memory>
 #include <vector>
 
@@ skipping 242 matching lines @@
   return frame_->non_client_view()
       ->GetWindowBoundsForClientBounds(gfx::Rect(pref))
       .size();
 }
 
 const char* NonClientFrameViewMash::GetClassName() const {
   return kViewClassName;
 }
 
 gfx::Size NonClientFrameViewMash::GetMinimumSize() const {
+  // If the client area is empty we assume the client is rendering everything
+  // and the window can be resized to anything.
+  // TODO(sky): we need a minimum-size property.
+  if (window_->client_area().IsEmpty())
+    return gfx::Size();
+
   gfx::Size min_client_view_size(frame_->client_view()->GetMinimumSize());
   return gfx::Size(
       std::max(header_view_->GetMinimumWidth(), min_client_view_size.width()),
       NonClientTopBorderHeight() + min_client_view_size.height());
 }
 
 gfx::Size NonClientFrameViewMash::GetMaximumSize() const {
   gfx::Size max_client_size(frame_->client_view()->GetMaximumSize());
   int width = 0;
   int height = 0;
@@ skipping 81 matching lines @@
 void NonClientFrameViewMash::OnWindowTreeFocusChanged(mus::Window* gained_focus,
                                                       mus::Window* lost_focus) {
   const bool had_focus = lost_focus && window_->Contains(lost_focus);
   const bool has_focus = gained_focus && window_->Contains(gained_focus);
   if (had_focus != has_focus)
     SchedulePaint();
 }
 
 }  // namespace wm
 }  // namespace mash