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

ash/wm/system_modal_container_layout_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/system_modal_container_layout_manager.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 164 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(), 100));
+            keyboard::FullWidthKeyboardBoundsFromRootBounds(
+                Shell::GetPrimaryRootWindow()->bounds(), 100));
       }
     } else {
       keyboard->HideKeyboard(keyboard::KeyboardController::HIDE_REASON_MANUAL);
     }
 
     DCHECK_EQ(show, keyboard->keyboard_visible());
   }
 
 };
 
@@ skipping 447 matching lines @@
   ShowKeyboard(true);
   EXPECT_EQ(modal_size.ToString(), modal_window->bounds().size().ToString());
   EXPECT_EQ(modal_origin.x(), modal_window->bounds().x());
   EXPECT_EQ(0, modal_window->bounds().y());
 
   ShowKeyboard(false);
 }
 
 }  // namespace test
 }  // namespace ash