Move Java Blimp shell code to app subpackage

blimp/client/app/android/java/src/org/chromium/blimp/toolbar/UrlBar.java

-// Copyright 2015 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.blimp.toolbar;
-
-import android.content.Context;
-import android.util.AttributeSet;
-import android.view.KeyEvent;
-import android.view.View;
-import android.view.View.OnKeyListener;
-import android.widget.EditText;
-
-import org.chromium.base.ObserverList;
-import org.chromium.ui.UiUtils;
-
-/**
- * A {@link View} that allows users to enter text and URLs.
- */
-public class UrlBar extends EditText implements OnKeyListener {
-    /**
-     * An observer that gets notified of relevant URL bar text changes.
-     */
-    public interface UrlBarObserver {
-        /**
-         * Will be called when the user presses enter after typing something into this
-         * {@link EditText}.
-         * @param text The new text the user entered.
-         */
-        void onNewTextEntered(String text);
-    }
-
-    private final ObserverList<UrlBarObserver> mObservers = new ObserverList<UrlBarObserver>();
-
-    /**
-     * Builds a new {@link UrlBar}.
-     * @param context A {@link Context} instance.
-     * @param attrs   An {@link AttributeSet} instance.
-     */
-    public UrlBar(Context context, AttributeSet attrs) {
-        super(context, attrs);
-        setOnKeyListener(this);
-    }
-
-    /**
-     * @return The current text of this {@link EditText}.  Guaranteed to be not {@code null}.
-     */
-    public String getQueryText() {
-        return getEditableText() == null ? "" : getEditableText().toString();
-    }
-
-    /**
-     * @param observer An {@link UrlBarObserver} that will be notified of future text entries.
-     */
-    public void addUrlBarObserver(UrlBarObserver observer) {
-        mObservers.addObserver(observer);
-    }
-
-    /**
-     * @param observer An {@link UrlBarObserver} that will no longer be notified of future text
-     *                 entries.
-     */
-    public void removeUrlBarObserver(UrlBarObserver observer) {
-        mObservers.removeObserver(observer);
-    }
-
-    // OnKeyListener interface.
-    @Override
-    public boolean onKey(View view, int keyCode, KeyEvent event) {
-        if (event.getAction() == KeyEvent.ACTION_UP
-                && (event.getKeyCode() == KeyEvent.KEYCODE_ENTER
-                || event.getKeyCode() == KeyEvent.KEYCODE_NUMPAD_ENTER)) {
-            UiUtils.hideKeyboard(view);
-            clearFocus();
-            for (UrlBarObserver observer : mObservers) {
-                observer.onNewTextEntered(getQueryText());
-            }
-        }
-        return false;
-    }
-}