Remove docked windows entirely in M59.

ash/shell_unittest.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 "ash/shell.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "ash/common/session/session_state_delegate.h"
@@ skipping 38 matching lines @@
                              kShellWindowId_DefaultContainer);
 }
 
 aura::Window* GetAlwaysOnTopContainer() {
   return Shell::GetContainer(Shell::GetPrimaryRootWindow(),
                              kShellWindowId_AlwaysOnTopContainer);
 }
 
 // Expect ALL the containers!
 void ExpectAllContainers() {
+  // Validate no duplicate container IDs.
+  std::set<int32_t> container_ids;
+  for (size_t i = 0; i < kAllShellContainerIdsSize; ++i)
+    EXPECT_TRUE(container_ids.insert(kAllShellContainerIds[i]).second);
+
   aura::Window* root_window = Shell::GetPrimaryRootWindow();
   EXPECT_TRUE(
       Shell::GetContainer(root_window, kShellWindowId_WallpaperContainer));
   EXPECT_TRUE(
       Shell::GetContainer(root_window, kShellWindowId_DefaultContainer));
   EXPECT_TRUE(
       Shell::GetContainer(root_window, kShellWindowId_AlwaysOnTopContainer));
   EXPECT_TRUE(Shell::GetContainer(root_window, kShellWindowId_PanelContainer));
   EXPECT_TRUE(Shell::GetContainer(root_window, kShellWindowId_ShelfContainer));
   EXPECT_TRUE(
@@ skipping 432 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(ShellTest2);
 };
 
 TEST_F(ShellTest2, DontCrashWhenWindowDeleted) {
   window_.reset(new aura::Window(NULL));
   window_->Init(ui::LAYER_NOT_DRAWN);
 }
 
 }  // namespace ash