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

ui/keyboard/keyboard_controller.h

Index: ui/keyboard/keyboard_controller.h
diff --git a/ui/keyboard/keyboard_controller.h b/ui/keyboard/keyboard_controller.h
index d81bedaf6c2b996cf8f659aeaf59b4f80afd3a81..f82f1c1ab873c9b3b3d4377db2f39af738b1c361 100644
--- a/ui/keyboard/keyboard_controller.h
+++ b/ui/keyboard/keyboard_controller.h
@@ -92,6 +92,8 @@ class KEYBOARD_EXPORT KeyboardController : public ui::InputMethodObserver,
 
   void set_lock_keyboard(bool lock) { lock_keyboard_ = lock; }
 
+  KeyboardMode keyboard_mode() { return keyboard_mode_; }
+
   void SetKeyboardMode(KeyboardMode mode);
 
   // Force the keyboard to show up if not showing and lock the keyboard if
@@ -123,6 +125,9 @@ class KEYBOARD_EXPORT KeyboardController : public ui::InputMethodObserver,
   // Updates insets on web content window
   void UpdateWindowInsets(aura::Window* window);
 
+  // Called when the root window bounds changed.
+  void OnRootWindowResized(const gfx::Rect& bounds);
+
  private:
   // For access to Observer methods for simulation.
   friend class KeyboardControllerTest;