Allow javascript change the virtual keyboard window size and position freely in FLOATING mode

ash/wm/lock_layout_manager_unittest.cc

 // Copyright 2014 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/display/display_manager.h"
 #include "ash/root_window_controller.h"
 #include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 75 matching lines @@
     keyboard::KeyboardController* keyboard =
         keyboard::KeyboardController::GetInstance();
     ASSERT_TRUE(keyboard);
     if (show == keyboard->keyboard_visible())
       return;
 
     if (show) {
       keyboard->ShowKeyboard(true);
       if (keyboard->proxy()->GetKeyboardWindow()->bounds().height() == 0) {
         keyboard->proxy()->GetKeyboardWindow()->SetBounds(
-            keyboard::KeyboardBoundsFromWindowBounds(
-                keyboard->GetContainerWindow()->bounds(),
+            keyboard::FullWidthKeyboardBoundsFromRootBounds(
+                Shell::GetPrimaryRootWindow()->bounds(),
                 kVirtualKeyboardHeight));
       }
     } else {
       keyboard->HideKeyboard(keyboard::KeyboardController::HIDE_REASON_MANUAL);
     }
 
     DCHECK_EQ(show, keyboard->keyboard_visible());
   }
 };
 
@@ skipping 175 matching lines @@
       ScreenUtil::GetDisplayWorkAreaBoundsInParent(window.get());
   window->SetBounds(work_area);
   // Usually work_area takes Shelf into account but that doesn't affect
   // LockScreen container windows.
   EXPECT_NE(work_area.ToString(), window->GetBoundsInScreen().ToString());
   EXPECT_EQ(screen_bounds.ToString(), window->GetBoundsInScreen().ToString());
 }
 
 }  // namespace test
 }  // namespace ash