[Chromoting] Add InputInjector and InputInjectorWrapper for easy unittesting

remoting/android/java/src/org/chromium/chromoting/DesktopView.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.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.Color;
@@ skipping 20 matching lines @@
  */
 /** GUI element that holds the drawing canvas. */
 public class DesktopView extends SurfaceView implements DesktopViewInterface,
         SurfaceHolder.Callback {
     /** Used to define the animation feedback shown when a user touches the screen. */
     public enum InputFeedbackType { NONE, SMALL_ANIMATION, LARGE_ANIMATION }
 
     private static final String TAG = "Chromoting";
 
     private final RenderData mRenderData;
-    private final TouchInputHandlerInterface mInputHandler;
+    private final TouchInputHandler mInputHandler;
 
     /** The parent Desktop activity. */
     private Desktop mDesktop;
 
     /** The Client connection, used to inject input and fetch the video frames. */
     private Client mClient;
 
 
     // Flag to prevent multiple repaint requests from being backed up. Requests for repainting will
     // be dropped if this is already set to true. This is used by the main thread and the painting
@@ skipping 35 matching lines @@
     }
 
     @Override
     public void init(Desktop desktop, Client client) {
         Preconditions.isNull(mDesktop);
         Preconditions.isNull(mClient);
         Preconditions.notNull(desktop);
         Preconditions.notNull(client);
         mDesktop = desktop;
         mClient = client;
-        mInputHandler.init(desktop, client);
+        mInputHandler.init(desktop, new InputEventSender(client));
     }
 
     public Event<PaintEventParameter> onPaint() {
         return mOnPaint;
     }
 
     public Event<SizeChangedEventParameter> onClientSizeChanged() {
         return mOnClientSizeChanged;
     }
 
@@ skipping 218 matching lines @@
     @Override
     public void setAnimationEnabled(boolean enabled) {
         synchronized (mAnimationLock) {
             if (enabled && !mInputAnimationRunning) {
                 requestRepaint();
             }
             mInputAnimationRunning = enabled;
         }
     }
 }