Magnifier needs to follow the focus of the textfield.

ui/base/ime/input_method_chromeos.h

 // 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.
 
 #ifndef UI_BASE_IME_INPUT_METHOD_CHROMEOS_H_
 #define UI_BASE_IME_INPUT_METHOD_CHROMEOS_H_
 
 #include <set>
 #include <string>
 
@@ skipping 94 matching lines @@
                                      uint32 cursor_pos,
                                      bool visible) override;
   virtual void DeleteSurroundingText(int32 offset, uint32 length) override;
 
   // Hides the composition text.
   void HidePreeditText();
 
   // Callback function for IMEEngineHandlerInterface::ProcessKeyEvent.
   void ProcessKeyEventDone(uint32 id, ui::KeyEvent* event, bool is_handled);
 
-  // Returns whether an input field is focused. Note that password field is not
-  // considered as an input field.
+  // Returns whether an non-password input field is focused.
+  bool IsNonPasswordInputFieldFocused();
+
+  // Returns true if an text input field is focused.
   bool IsInputFieldFocused();
 
   // All pending key events. Note: we do not own these object, we just save
   // pointers to these object so that we can abandon them when necessary.
   // They will be deleted in ProcessKeyEventDone().
   std::set<uint32> pending_key_events_;
 
   // Pending composition text generated by the current pending key event.
   // It'll be sent to the focused text input client as soon as we receive the
   // processing result of the pending key event.
@@ skipping 22 matching lines @@
 
   // Used for making callbacks.
   base::WeakPtrFactory<InputMethodChromeOS> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodChromeOS);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IME_INPUT_METHOD_CHROMEOS_H_