Fix the incorrect native ImeAdapter attach and detach.

content/browser/renderer_host/ime_adapter_android.cc

 // Copyright (c) 2012 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/browser/renderer_host/ime_adapter_android.h"
 
 #include <android/input.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
@@ skipping 248 matching lines @@
 
 void ImeAdapterAndroid::Paste(JNIEnv* env, jobject) {
   RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(
       rwhva_->GetRenderWidgetHost());
   if (!rwhi)
     return;
 
   rwhi->Send(new ViewMsg_Paste(rwhi->GetRoutingID()));
 }
 
+void ImeAdapterAndroid::ResetImeAdapter(JNIEnv* env, jobject) {
+  java_ime_adapter_.reset();
+}
+
 }  // namespace content