Add scroll perf test for protocol in chromoting

remoting/remoting_test.gypi

Index: remoting/remoting_test.gypi
diff --git a/remoting/remoting_test.gypi b/remoting/remoting_test.gypi
index d4e0c73c01b79b539ceb33cb5828de28c2b0ee00..9e422bda47d49757a3ca49bf022624688eb248ae 100644
--- a/remoting/remoting_test.gypi
+++ b/remoting/remoting_test.gypi
@@ -96,6 +96,8 @@
         'test/fake_remote_host_info_fetcher.h',
         'test/fake_socket_factory.cc',
         'test/fake_socket_factory.h',
+        'test/frame_generator_util.cc',
+        'test/frame_generator_util.h',
         'test/host_info.cc',
         'test/host_info.h',
         'test/host_list_fetcher.cc',
@@ -114,6 +116,8 @@
         'test/remote_host_info_fetcher.h',
         'test/rgb_value.cc',
         'test/rgb_value.h',
+        'test/scroll_frame_generator.cc',
+        'test/scroll_frame_generator.h',
         'test/test_chromoting_client.cc',
         'test/test_chromoting_client.h',
         'test/test_video_renderer.cc',