Add support for X11 workspaces

ui/views/widget/native_widget_aura.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 "ui/views/widget/native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_util.h"
 #include "build/build_config.h"
@@ skipping 378 matching lines @@
     // alignment but preserve restored size and vertical offset for the time
     // when the |window_| gets undocked.
     if (restore_bounds) {
       bounds.set_size(restore_bounds->size());
       bounds.set_y(restore_bounds->y());
     }
   }
   return bounds;
 }
 
+std::string NativeWidgetAura::GetWorkspace() const {
+  return "";

[sky, 2016/05/03 17:40:53]

std::string()

+}
+
 void NativeWidgetAura::SetBounds(const gfx::Rect& bounds) {
   if (!window_)
     return;
 
   aura::Window* root = window_->GetRootWindow();
   if (root) {
     aura::client::ScreenPositionClient* screen_position_client =
         aura::client::GetScreenPositionClient(root);
     if (screen_position_client) {
       gfx::Display dst_display =
@@ skipping 762 matching lines @@
   l10n_util::AdjustUIFont(&(ncm.lfCaptionFont));
   base::win::ScopedHFONT caption_font(CreateFontIndirect(&(ncm.lfCaptionFont)));
   return gfx::FontList(gfx::Font(caption_font.get()));
 #else
   return gfx::FontList();
 #endif
 }
 
 }  // namespace internal
 }  // namespace views