Move ClientSession's input logic into separate components.

remoting/remoting.gyp

Index: remoting/remoting.gyp
diff --git a/remoting/remoting.gyp b/remoting/remoting.gyp
index 63510c49695ede3718c1f25260b8ec8527014517..a538c4f2d707efae729f6129bb8dd4bb9d5595df 100644
--- a/remoting/remoting.gyp
+++ b/remoting/remoting.gyp
@@ -573,6 +573,8 @@
         'host/policy_hack/nat_policy_win.cc',
         'host/register_support_host_request.cc',
         'host/register_support_host_request.h',
+        'host/remote_input_filter.cc',
+        'host/remote_input_filter.h',
         'host/screen_recorder.cc',
         'host/screen_recorder.h',
         'host/server_log_entry.cc',
@@ -868,8 +870,8 @@
         'protocol/jingle_session.h',
         'protocol/jingle_session_manager.cc',
         'protocol/jingle_session_manager.h',
-        'protocol/key_event_tracker.cc',
-        'protocol/key_event_tracker.h',
+        'protocol/input_event_tracker.cc',
+        'protocol/input_event_tracker.h',
         'protocol/libjingle_transport_factory.cc',
         'protocol/libjingle_transport_factory.h',
         'protocol/me2me_host_authenticator_factory.cc',
@@ -999,6 +1001,7 @@
         'host/capturer_linux_unittest.cc',
         'host/capturer_mac_unittest.cc',
         'host/capturer_win_unittest.cc',
+        'host/remote_input_filter.cc',
         'host/test_key_pair.h',
         'jingle_glue/fake_signal_strategy.cc',
         'jingle_glue/fake_signal_strategy.h',
@@ -1017,7 +1020,7 @@
         'protocol/fake_session.h',
         'protocol/jingle_messages_unittest.cc',
         'protocol/jingle_session_unittest.cc',
-        'protocol/key_event_tracker_unittest.cc',
+        'protocol/input_event_tracker_unittest.cc',
         'protocol/message_decoder_unittest.cc',
         'protocol/message_reader_unittest.cc',
         'protocol/negotiating_authenticator_unittest.cc',