Handler shown in editable field should be removed on any key press on keypad.

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.app.Activity;
 import android.app.SearchManager;
 import android.content.ContentResolver;
@@ skipping 515 matching lines @@
     @VisibleForTesting
     public AdapterInputConnection getInputConnectionForTest() {
         return mInputConnection;
     }
 
     private ImeAdapter createImeAdapter(Context context) {
         return new ImeAdapter(mInputMethodManagerWrapper,
                 new ImeAdapter.ImeAdapterDelegate() {
                     @Override
                     public void onImeEvent(boolean isFinish) {
                         getContentViewClient().onImeEvent();

[jdduke (slow), 2014/06/27 15:25:01]

So, is this function not getting called when we delete a character? 

What if we move the hideHandles() call to |ContentViewCore.dispatchKeyEvent()|?

[aurimas (slooooooooow), 2014/06/27 15:55:38]

We can simply start calling mViewEmbedder.onImeEvent(false) in
ImeAdapter#deleteSurroundingText(..)

                         if (!isFinish) {
                             hideHandles();
                         }
                     }
 
                     @Override
                     public void onDismissInput() {
                         getContentViewClient().onImeStateChangeRequested(false);
                     }
 
@@ skipping 1421 matching lines @@
                 }
 
             };
 
             mSelectionHandleController.hideAndDisallowAutomaticShowing();
         }
 
         return mSelectionHandleController;
     }
 
-    private InsertionHandleController getInsertionHandleController() {
+    protected InsertionHandleController getInsertionHandleController() {

[jdduke (slow), 2014/06/27 15:25:01]

Hmm, exposing the internals of handle manipulation to ContentView or ImeAdapter
is  probably the wrong direction, particularly as these handles will be removed
in the next several weeks (see https://codereview.chromium.org/335943002/).

         if (mInsertionHandleController == null) {
             mInsertionHandleController = new InsertionHandleController(
                     getContainerView(), mPositionObserver) {
                 private static final int AVERAGE_LINE_HEIGHT = 14;
 
                 @Override
                 public void setCursorPosition(int x, int y) {
                     if (mNativeContentViewCore != 0) {
                         nativeMoveCaret(mNativeContentViewCore,
                                 x, y - mRenderCoordinates.getContentOffsetYPix());
@@ skipping 1329 matching lines @@
 
     private native void nativeExtractSmartClipData(long nativeContentViewCoreImpl,
             int x, int y, int w, int h);
     private native void nativeSetBackgroundOpaque(long nativeContentViewCoreImpl, boolean opaque);
 
     private native void nativeResumeResponseDeferredAtStart(
             long nativeContentViewCoreImpl);
     private native void nativeSetHasPendingNavigationTransitionForTesting(
             long nativeContentViewCoreImpl);
 }