Add AppWindow.setVisibleOnAllWorkspaces.

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

Index: chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm b/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
index 72407678984f0e95927ca4bbe1128cb97c1ac7df..365a0154f9aaaeb8ff770407c2cf0a1f1f0a8b89 100644
--- a/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
+++ b/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
@@ -1,4 +1,4 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
+// Copyright 2013 The Chromium Authors. All rights rerved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -60,6 +60,15 @@ void SetFullScreenCollectionBehavior(NSWindow* window, bool allow_fullscreen) {
   [window setCollectionBehavior:behavior];
 }
 
+void SetWorkspacesCollectionBehavior(NSWindow* window, bool always_visible) {
+  NSWindowCollectionBehavior behavior = [window collectionBehavior];
+  if (always_visible)
+    behavior |= NSWindowCollectionBehaviorCanJoinAllSpaces;
+  else
+    behavior &= ~NSWindowCollectionBehaviorCanJoinAllSpaces;
+  [window setCollectionBehavior:behavior];
+}
+
 void InitCollectionBehavior(NSWindow* window) {
   // Since always-on-top windows have a higher window level
   // than NSNormalWindowLevel, they will default to
@@ -380,6 +389,8 @@ NativeAppWindowCocoa::NativeAppWindowCocoa(
     [window setLevel:AlwaysOnTopWindowLevel()];
   InitCollectionBehavior(window);
 
+  SetWorkspacesCollectionBehavior(window, params.visible_on_all_workspaces);
+
   window_controller_.reset(
       [[NativeAppWindowController alloc] initWithWindow:window.release()]);
 
@@ -974,6 +985,10 @@ void NativeAppWindowCocoa::SetAlwaysOnTop(bool always_on_top) {
                                       NSNormalWindowLevel)];
 }
 
+void NativeAppWindowCocoa::SetVisibleOnAllWorkspaces(bool always_visible) {
+  SetWorkspacesCollectionBehavior(window(), always_visible);
+}
+
 NativeAppWindowCocoa::~NativeAppWindowCocoa() {
 }