Add AppWindow.setVisibleOnAllWorkspaces.

chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm

 // Copyright 2013 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/cocoa/apps/native_app_window_cocoa.h"
 
 #include "apps/app_shim/extension_app_shim_handler_mac.h"
 #include "base/command_line.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
@@ skipping 957 matching lines @@
     [[window() standardWindowButton:NSWindowZoomButton]
         setEnabled:shows_fullscreen_controls_];
   }
 }
 
 void NativeAppWindowCocoa::SetAlwaysOnTop(bool always_on_top) {
   [window() setLevel:(always_on_top ? AlwaysOnTopWindowLevel() :
                                       NSNormalWindowLevel)];
 }
 
+void NativeAppWindowCocoa::SetVisibleOnAllWorkspaces(bool always_visible) {
+  NSWindowCollectionBehavior behavior = [window() collectionBehavior];
+  if (always_visible)
+    behavior |= NSWindowCollectionBehaviorCanJoinAllSpaces;
+  else
+    behavior &= ~NSWindowCollectionBehaviorCanJoinAllSpaces;
+  [window() setCollectionBehavior:behavior];
+}
+
 NativeAppWindowCocoa::~NativeAppWindowCocoa() {
 }
 
 ShellNSWindow* NativeAppWindowCocoa::window() const {
   NSWindow* window = [window_controller_ window];
   CHECK(!window || [window isKindOfClass:[ShellNSWindow class]]);
   return static_cast<ShellNSWindow*>(window);
 }
 
 content::WebContents* NativeAppWindowCocoa::WebContents() const {
   return app_window_->web_contents();
 }
 
 void NativeAppWindowCocoa::UpdateRestoredBounds() {
   if (IsRestored(*this))
     restored_bounds_ = [window() frame];
 }
 
 void NativeAppWindowCocoa::HideWithoutMarkingHidden() {
   [window() orderOut:window_controller_];
 }