Magnifier needs to follow the focus of the textfield.

ui/base/ime/input_method_base.h

Index: ui/base/ime/input_method_base.h
diff --git a/ui/base/ime/input_method_base.h b/ui/base/ime/input_method_base.h
index 8c6dd258d76ae094ed22ea2f1ee0847ab594aaa5..b81f8e3fdf85a84fa2db95a003c00e213b966c5b 100644
--- a/ui/base/ime/input_method_base.h
+++ b/ui/base/ime/input_method_base.h
@@ -81,6 +81,10 @@ class UI_BASE_EXPORT InputMethodBase
   // Convenience method to notify all observers of TextInputClient changes.
   void NotifyTextInputStateChanged(const TextInputClient* client);
 
+  // Convenience method to notify all observers of CaretBounds changes on
+  // |client| which is the text input client with focus.
+  void NotifyTextInputCaretBoundsChanged(const TextInputClient* client);
+
   // Interface for for signalling candidate window events.
   // See also *Callback functions below. To avoid reentrancy issue that
   // TextInputClient manipulates IME state during even handling, these methods