Revert of Remove unused PPB_View_Dev

ppapi/ppapi_sources.gypi

 # Copyright (c) 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.
 
 {
   'variables': {
     'c_source_files': [
       'c/pp_array_output.h',
       'c/pp_bool.h',
       'c/pp_codecs.h',
@@ skipping 272 matching lines @@
       'cpp/dev/url_util_dev.cc',
       'cpp/dev/url_util_dev.h',
       'cpp/dev/video_capture_client_dev.cc',
       'cpp/dev/video_capture_client_dev.h',
       'cpp/dev/video_capture_dev.cc',
       'cpp/dev/video_capture_dev.h',
       'cpp/dev/video_decoder_client_dev.cc',
       'cpp/dev/video_decoder_client_dev.h',
       'cpp/dev/video_decoder_dev.cc',
       'cpp/dev/video_decoder_dev.h',
+      'cpp/dev/view_dev.cc',
+      'cpp/dev/view_dev.h',
       'cpp/dev/widget_client_dev.cc',
       'cpp/dev/widget_client_dev.h',
       'cpp/dev/widget_dev.cc',
       'cpp/dev/widget_dev.h',
       'cpp/dev/zoom_dev.cc',
       'cpp/dev/zoom_dev.h',
 
       # Deprecated interfaces.
       'cpp/dev/scriptable_object_deprecated.h',
       'cpp/dev/scriptable_object_deprecated.cc',
@@ skipping 269 matching lines @@
       'tests/test_x509_certificate_private.h',
 
       # Deprecated test cases.
       'tests/test_instance_deprecated.cc',
       'tests/test_instance_deprecated.h',
       'tests/test_var_deprecated.cc',
       'tests/test_var_deprecated.h',
     ],
   },
 }