Fix OSK flickering issue

content/renderer/ime_event_guard.cc

 // Copyright 2013 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 "content/renderer/ime_event_guard.h"
 
 #include "content/renderer/render_widget.h"
 
 namespace content {
 
-ImeEventGuard::ImeEventGuard(RenderWidget* widget) : widget_(widget) {
-  widget_->StartHandlingImeEvent();
+ImeEventGuard::ImeEventGuard(RenderWidget* widget)
+  : widget_(widget),
+    from_non_ime_(false) {
+  widget_->OnImeEventGuardStart();
+}
+
+ImeEventGuard::ImeEventGuard(RenderWidget* widget, bool from_non_ime)
+  : ImeEventGuard(widget) {
+  from_non_ime_ = from_non_ime;
 }
 
 ImeEventGuard::~ImeEventGuard() {
-  widget_->FinishHandlingImeEvent();
+  widget_->OnImeEventGuardFinish(from_non_ime_);
 }
 
 } //  namespace content