[Remoting Android] Remove unused DesktopViewFactory

remoting/android/client_java_tmpl.gni

 # 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.
 
 import("//build/config/android/rules.gni")
 import("//remoting/remoting_options.gni")
 
 template("remoting_android_client_java_tmpl") {
   android_library(target_name) {
     _java_file_prefix = "//remoting/android/java/src/org/chromium/chromoting"
     _java_files = [
       "AccountsAdapter.java",
       "ActivityLifecycleListener.java",
       "AnimationJob.java",
       "Capabilities.java",
       "CapabilityManager.java",
       "Chromoting.java",
       "ChromotingDownloadManager.java",
       "ChromotingUtil.java",
       "ClientExtension.java",
       "Desktop.java",
       "DesktopCanvas.java",
       "DesktopView.java",
-      "DesktopViewFactory.java",
       "DummyActivityLifecycleListener.java",
       "DummyClientExtension.java",
       "Event.java",
       "FlingAnimationJob.java",
       "HostInfo.java",
       "HostListAdapter.java",
       "HostListManager.java",
       "InputEventSender.java",
       "InputFeedbackRadiusMapper.java",
       "InputModeChangedEventParameter.java",
@@ skipping 48 matching lines @@
       "//third_party/android_tools:android_support_annotations_java",
       "//third_party/android_tools:android_support_v4_java",
       "//third_party/android_tools:android_support_v7_appcompat_java",
       "//third_party/android_tools:android_support_v7_mediarouter_java",
       "//ui/android:ui_java",
     ]
 
     deps += [ invoker.remoting_google_play_services_library ]
   }
 }