Fix the incorrect native ImeAdapter attach and detach.

content/public/android/java/src/org/chromium/content/browser/input/ImeAdapter.java

 // 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.
 
 package org.chromium.content.browser.input;
 
 import android.content.Context;
 import android.os.Handler;
 import android.os.ResultReceiver;
 import android.view.KeyCharacterMap;
@@ skipping 235 matching lines @@
             if (showIfNeeded) {
                 showKeyboard();
             }
         } else if (hasInputType() && showIfNeeded) {
             showKeyboard();
         }
     }
 
     public void attach(int nativeImeAdapter, int textInputType, int selectionStart,
             int selectionEnd) {
+        if (mNativeImeAdapterAndroid != 0) {
+            nativeResetImeAdapter(mNativeImeAdapterAndroid);
+        }
         mNativeImeAdapterAndroid = nativeImeAdapter;
         mTextInputType = textInputType;
         mInitialSelectionStart = selectionStart;
         mInitialSelectionEnd = selectionEnd;
         nativeAttachImeAdapter(mNativeImeAdapterAndroid);
     }
 
     /**
      * Attaches the imeAdapter to its native counterpart. This is needed to start forwarding
      * keyboard events to WebKit.
      * @param nativeImeAdapter The pointer to the native ImeAdapter object.
      */
     public void attach(int nativeImeAdapter) {
+        if (mNativeImeAdapterAndroid != 0) {
+            nativeResetImeAdapter(mNativeImeAdapterAndroid);
+        }
         mNativeImeAdapterAndroid = nativeImeAdapter;
         if (nativeImeAdapter != 0) {
             nativeAttachImeAdapter(mNativeImeAdapterAndroid);
         }
     }
 
     /**
      * Used to check whether the native counterpart of the ImeAdapter has been attached yet.
      * @return Whether native ImeAdapter has been attached and its pointer is currently nonzero.
      */
@@ skipping 283 matching lines @@
     private native void nativeDeleteSurroundingText(int nativeImeAdapterAndroid,
             int before, int after);
 
     private native void nativeImeBatchStateChanged(int nativeImeAdapterAndroid, boolean isBegin);
 
     private native void nativeUnselect(int nativeImeAdapterAndroid);
     private native void nativeSelectAll(int nativeImeAdapterAndroid);
     private native void nativeCut(int nativeImeAdapterAndroid);
     private native void nativeCopy(int nativeImeAdapterAndroid);
     private native void nativePaste(int nativeImeAdapterAndroid);
+    private native void nativeResetImeAdapter(int nativeImeAdapterAndroid);
 }