[PPAPI] Add browser tests for compositor API

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 388 matching lines @@
       'tests/all_cpp_includes.h',
       'tests/arch_dependent_sizes_32.h',
       'tests/arch_dependent_sizes_64.h',
       'tests/pp_thread.h',
       'tests/test_audio.cc',
       'tests/test_audio.h',
       'tests/test_audio_config.cc',
       'tests/test_audio_config.h',
       'tests/test_case.cc',
       'tests/test_case.h',
+      'tests/test_compositor.cc',
+      'tests/test_compositor.h',
       'tests/test_console.cc',
       'tests/test_console.h',
       'tests/test_core.cc',
       'tests/test_core.h',
       'tests/test_cursor_control.cc',
       'tests/test_cursor_control.h',
       'tests/test_empty.cc',
       'tests/test_empty.h',
       'tests/test_file_io.cc',
       'tests/test_file_io.h',
@@ skipping 153 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',
     ],
   },
 }