Rename GetRootWindow() -> GetPrimaryRootWindow()

ash/wm/workspace/workspace_manager_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/wm/workspace/workspace_manager.h"
 
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 433 matching lines @@
   EXPECT_EQ(w2.get(), workspaces()[0]->windows()[1]);
   EXPECT_TRUE(w2->layer()->IsDrawn());
 }
 
 // Verifies ShelfLayoutManager's visibility/auto-hide state is correctly
 // updated.
 TEST_F(WorkspaceManagerTest, ShelfStateUpdated) {
   // Since ShelfLayoutManager queries for mouse location, move the mouse so
   // it isn't over the shelf.
   aura::test::EventGenerator generator(
-      Shell::GetInstance()->GetRootWindow(), gfx::Point());
+      Shell::GetPrimaryRootWindow(), gfx::Point());
   generator.MoveMouseTo(0, 0);
 
   // Two windows, w1 normal, w2 maximized.
   scoped_ptr<Window> w1(CreateTestWindow());
   w1->SetBounds(gfx::Rect(0, 1, 101, 102));
   w1->Show();
 
   ShelfLayoutManager* shelf = Shell::GetInstance()->shelf();
 
   EXPECT_EQ(ShelfLayoutManager::VISIBLE, shelf->visibility_state());
@@ skipping 199 matching lines @@
   w1->Show();
   w1->SetProperty(aura::client::kAnimationsDisabledKey, true);
 
   w2->Show();
   w2->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MAXIMIZED);
   EXPECT_TRUE(w1->GetProperty(aura::client::kAnimationsDisabledKey));
 }
 
 }  // namespace internal
 }  // namespace ash