Magnifier needs to follow the focus of the textfield.

ui/base/ime/input_method_chromeos.cc

 // 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.
 
 #include "ui/base/ime/input_method_chromeos.h"
 
 #include <algorithm>
 #include <cstring>
 #include <set>
 #include <vector>
@@ skipping 157 matching lines @@
     engine->FocusOut();
     chromeos::IMEEngineHandlerInterface::InputContext context(
         GetTextInputType(), GetTextInputMode());
     engine->FocusIn(context);
   }
 
   InputMethodBase::OnTextInputTypeChanged(client);
 }
 
 void InputMethodChromeOS::OnCaretBoundsChanged(const TextInputClient* client) {
-  if (!IsInputFieldFocused() || !IsTextInputClientFocused(client))
+  if (!IsTextInputFieldFocused() || !IsTextInputClientFocused(client))
+    return;
+
+  NotifyTextInputCaretBoundsChanged(client);
+
+  if (!IsInputFieldFocused())
     return;
 
   // The current text input type should not be NONE if |context_| is focused.
   DCHECK(!IsTextInputTypeNone());
   const gfx::Rect rect = GetTextInputClient()->GetCaretBounds();
 
   gfx::Rect composition_head;
   if (!GetTextInputClient()->GetCompositionCharacterBounds(0,
                                                            &composition_head)) {
     composition_head = rect;
@@ skipping 463 matching lines @@
     out_composition->underlines.push_back(CompositionUnderline(
         0, length, SK_ColorBLACK, false /* thick */, SK_ColorTRANSPARENT));
   }
 }
 
 bool InputMethodChromeOS::IsInputFieldFocused() {
   TextInputType type = GetTextInputType();
   return (type != TEXT_INPUT_TYPE_NONE) && (type != TEXT_INPUT_TYPE_PASSWORD);
 }
 
+bool InputMethodChromeOS::IsTextInputFieldFocused() {
+  return GetTextInputType() != TEXT_INPUT_TYPE_NONE;
+}
+
 }  // namespace ui