Linux UI: Add IsVisibleOnAllWorkspaces()

chrome/test/base/test_browser_window.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 "chrome/test/base/test_browser_window.h"
 
 #include "base/memory/ptr_util.h"
 #include "build/build_config.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_list_observer.h"
@@ skipping 180 matching lines @@
     const extensions::Command& command) {}
 
 ExclusiveAccessContext* TestBrowserWindow::GetExclusiveAccessContext() {
   return nullptr;
 }
 
 std::string TestBrowserWindow::GetWorkspace() const {
   return std::string();
 }
 
+bool TestBrowserWindow::IsVisibleOnAllWorkspaces() const {
+  return false;
+}
+
 // TestBrowserWindowOwner -----------------------------------------------------
 
 TestBrowserWindowOwner::TestBrowserWindowOwner(TestBrowserWindow* window)
     : window_(window) {
   BrowserList::AddObserver(this);
 }
 
 TestBrowserWindowOwner::~TestBrowserWindowOwner() {
   BrowserList::RemoveObserver(this);
 }
 
 void TestBrowserWindowOwner::OnBrowserRemoved(Browser* browser) {
   if (browser->window() == window_.get())
     delete this;
 }