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

ash/wm/system_modal_container_layout_manager_unittest.cc

Index: ash/wm/system_modal_container_layout_manager_unittest.cc
diff --git a/ash/wm/system_modal_container_layout_manager_unittest.cc b/ash/wm/system_modal_container_layout_manager_unittest.cc
index 1f74726968bf8a0cd436f0f443839556d7b2f819..6229587b890fb91196e300c6748ee4793d82a518 100644
--- a/ash/wm/system_modal_container_layout_manager_unittest.cc
+++ b/ash/wm/system_modal_container_layout_manager_unittest.cc
@@ -182,8 +182,8 @@ class SystemModalContainerLayoutManagerTest : public AshTestBase {
       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);