Add Help & feedback screens to Android Chromoting client

remoting/android/java/src/org/chromium/chromoting/Desktop.java

 // Copyright 2013 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.chromoting;
 
 import android.app.Activity;
+import android.content.Intent;
 import android.content.res.Configuration;
+import android.net.Uri;
 import android.os.Bundle;
 import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.ImageButton;
 
 import org.chromium.chromoting.jni.JniInterface;
 
 /**
  * A simple screen that does nothing except display a DesktopView and notify it of rotations.
  */
 public class Desktop extends Activity {
+    /** Web page to be displayed in the Help screen when launched from this activity. */
+    private static final String HELP_URL =
+            "http://support.google.com/chrome/?p=mobile_crd_connecthost";
+
     /** The surface that displays the remote host's desktop feed. */
     private DesktopView mRemoteHostDesktop;
 
     /** The button used to show the action bar. */
     private ImageButton mOverlayButton;
 
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ skipping 67 matching lines @@
                     };
                     for (int key : keys) {
                         JniInterface.keyboardAction(key, true);
                     }
                     for (int key : keys) {
                         JniInterface.keyboardAction(key, false);
                     }
                 }
                 return true;
 
+            case R.id.actionbar_help:
+                {
+                    Intent intent = new Intent(this, HelpActivity.class);
+                    intent.setData(Uri.parse(HELP_URL));
+                    startActivity(intent);
+                }
+                return true;
+
             default:
                 return super.onOptionsItemSelected(item);
         }
     }
 
     /**
      * Called once when a keyboard key is pressed, then again when that same key is released. This
      * is not guaranteed to be notified of all soft keyboard events: certian keyboards might not
      * call it at all, while others might skip it in certain situations (e.g. swipe input).
      */
@@ skipping 23 matching lines @@
                 break;
 
             default:
                 // We try to send all other key codes to the host directly.
                 JniInterface.keyboardAction(event.getKeyCode(), depressed);
         }
 
         return super.dispatchKeyEvent(event);
     }
 }