Add a ppapi_unittests_run target.

build/gn_migration.gypi

 # Copyright (c) 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.
 
 # This file defines five targets that we are using to track the progress of the
 # GYP->GN migration:
 #
 # 'both_gn_and_gyp' lists what GN is currently capable of building and should
 # match the 'both_gn_and_gyp' target in //BUILD.gn.
 #
@@ skipping 557 matching lines @@
             '../gpu/gpu.gyp:gpu_unittests_run',
             '../media/blink/media_blink.gyp:media_blink_unittests_run',
             '../media/cast/cast.gyp:cast_unittests_run',
             '../media/media.gyp:media_unittests_run',
             '../media/midi/midi.gyp:midi_unittests_run',
             '../mojo/mojo_edk_tests.gyp:mojo_public_bindings_unittests_run',
             '../mojo/mojo_edk_tests.gyp:mojo_public_environment_unittests_run',
             '../mojo/mojo_edk_tests.gyp:mojo_public_system_unittests_run',
             '../mojo/mojo_edk_tests.gyp:mojo_public_utility_unittests_run',
             '../net/net.gyp:net_unittests_run',
+            '../ppapi/ppapi_internal.gyp:ppapi_unittests_run',
             '../printing/printing.gyp:printing_unittests_run',
             '../remoting/remoting.gyp:remoting_unittests_run',
             '../skia/skia_tests.gyp:skia_unittests_run',
             '../sql/sql.gyp:sql_unittests_run',
             '../sync/sync.gyp:sync_unit_tests_run',
             '../third_party/WebKit/Source/platform/blink_platform_tests.gyp:blink_heap_unittests_run',
             '../third_party/WebKit/Source/platform/blink_platform_tests.gyp:blink_platform_unittests_run',
             '../third_party/WebKit/Source/web/web_tests.gyp:webkit_unit_tests_run',
             '../third_party/WebKit/Source/wtf/wtf_tests.gyp:wtf_unittests_run',
             '../third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation_unittests_run',
@@ skipping 194 matching lines @@
         }],
         ['OS=="android" and target_arch != "x64"', {
           'dependencies': [
             '../third_party/android_platform/relocation_packer.gyp:android_relocation_packer_unittests#host'
           ],
         }],
       ],
     },
   ]
 }