Fix composition key-code after switching to a new input field.

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

 // Copyright 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.os.Handler;
 import android.os.ResultReceiver;
 import android.os.SystemClock;
 import android.text.Editable;
@@ skipping 162 matching lines @@
     InputMethodManagerWrapper getInputMethodManagerWrapper() {
         return mInputMethodManagerWrapper;
     }
 
     /**
      * Set the current active InputConnection when a new InputConnection is constructed.
      * @param inputConnection The input connection that is currently used with IME.
      */
     void setInputConnection(AdapterInputConnection inputConnection) {
         mInputConnection = inputConnection;
+        mLastComposeText = null;
     }
 
     /**
      * Should be only used by AdapterInputConnection.
      * @return The input type of currently focused element.
      */
     int getTextInputType() {
         return mTextInputType;
     }
 
@@ skipping 59 matching lines @@
             showKeyboard();
         }
     }
 
     public void attach(long nativeImeAdapter, int textInputType) {
         if (mNativeImeAdapterAndroid != 0) {
             nativeResetImeAdapter(mNativeImeAdapterAndroid);
         }
         mNativeImeAdapterAndroid = nativeImeAdapter;
         mTextInputType = textInputType;
+        mLastComposeText = null;
         if (nativeImeAdapter != 0) {
             nativeAttachImeAdapter(mNativeImeAdapterAndroid);
         }
         if (mTextInputType == sTextInputTypeNone) {
             dismissInput(false);
         }
     }
 
     /**
      * Attaches the imeAdapter to its native counterpart. This is needed to start forwarding
@@ skipping 156 matching lines @@
             }
 
             nativeSendSyntheticKeyEvent(mNativeImeAdapterAndroid, sEventTypeKeyUp,
                     timeStampMs, keyCode, 0);
         }
 
         return true;
     }
 
     void finishComposingText() {
+        mLastComposeText = null;
         if (mNativeImeAdapterAndroid == 0) return;
         nativeFinishComposingText(mNativeImeAdapterAndroid);
     }
 
     boolean translateAndSendNativeEvents(KeyEvent event) {
         if (mNativeImeAdapterAndroid == 0) return false;
 
         int action = event.getAction();
         if (action != KeyEvent.ACTION_DOWN &&
             action != KeyEvent.ACTION_UP) {
@@ skipping 212 matching lines @@
     private native void nativeDeleteSurroundingText(long nativeImeAdapterAndroid,
             int before, int after);
 
     private native void nativeUnselect(long nativeImeAdapterAndroid);
     private native void nativeSelectAll(long nativeImeAdapterAndroid);
     private native void nativeCut(long nativeImeAdapterAndroid);
     private native void nativeCopy(long nativeImeAdapterAndroid);
     private native void nativePaste(long nativeImeAdapterAndroid);
     private native void nativeResetImeAdapter(long nativeImeAdapterAndroid);
 }