Introduce ThreadedInputConnection behind a switch

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.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;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.SearchManager;
@@ skipping 316 matching lines @@
         public void navigationEntryCommitted() {
             determinedProcessVisibility();
         }
 
         private void resetPopupsAndInput() {
             ContentViewCore contentViewCore = mWeakContentViewCore.get();
             if (contentViewCore == null) return;
             contentViewCore.mIsMobileOptimizedHint = false;
             contentViewCore.hidePopupsAndClearSelection();
             contentViewCore.resetScrollInProgress();
+            contentViewCore.mImeAdapter.reset();
         }
 
         private void determinedProcessVisibility() {
             ContentViewCore contentViewCore = mWeakContentViewCore.get();
             if (contentViewCore == null) return;
             // Signal to the process management logic that we can now rely on the process
             // visibility signal for binding management. Before the navigation commits, its
             // renderer is considered background even if the pending navigation happens in the
             // foreground renderer.
             ChildProcessLauncher.determinedVisibility(contentViewCore.getCurrentRenderProcessId());
@@ skipping 580 matching lines @@
      * onDetachedFromWindow() which is guaranteed to be called in Android WebView.
      */
     public void destroy() {
         if (mNativeContentViewCore != 0) {
             nativeOnJavaContentViewCoreDestroyed(mNativeContentViewCore);
         }
         mWebContentsObserver.destroy();
         mWebContentsObserver = null;
         setSmartClipDataListener(null);
         setZoomControlsDelegate(null);
+        mImeAdapter.reset();
         // TODO(igsolla): address TODO in ContentViewClient because ContentViewClient is not
         // currently a real Null Object.
         //
         // Instead of deleting the client we use the Null Object pattern to avoid null checks
         // in this class.
         mContentViewClient = new ContentViewClient();
         mWebContents = null;
         mOverscrollRefreshHandler = null;
         mNativeContentViewCore = 0;
         mJavaScriptInterfaces.clear();
@@ skipping 2363 matching lines @@
     private native void nativeSetTextTrackSettings(long nativeContentViewCoreImpl,
             boolean textTracksEnabled, String textTrackBackgroundColor, String textTrackFontFamily,
             String textTrackFontStyle, String textTrackFontVariant, String textTrackTextColor,
             String textTrackTextShadow, String textTrackTextSize);
 
     private native void nativeExtractSmartClipData(long nativeContentViewCoreImpl,
             int x, int y, int w, int h);
 
     private native void nativeSetBackgroundOpaque(long nativeContentViewCoreImpl, boolean opaque);
 }