Adds the UserInputMonitor implementation for Windows.

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index ab2701881dd76e422e62f20d981e9d6cf9265145..321290ba307f11e75b80b40de816ee28519d62a9 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -686,8 +686,6 @@
             'audio/cras/cras_input.h',
             'audio/cras/cras_unified.cc',
             'audio/cras/cras_unified.h',
-            'base/keyboard_event_counter.cc',
-            'base/keyboard_event_counter.h',
           ],
         }],
         ['use_pulseaudio==1', {
@@ -882,6 +880,12 @@
             'ENABLE_EAC3_PLAYBACK',
           ],
         }],
+        ['OS!="linux" and OS!="win"', {
+            'sources!': [

[Sergey Ulanov, 2013/09/04 18:40:09]

indentation

[jiayl, 2013/09/05 00:29:38]

Done.

+            'base/keyboard_event_counter.cc',
+            'base/keyboard_event_counter.h',
+          ],
+        }],
       ],
       'target_conditions': [
         ['OS=="ios"', {
@@ -970,6 +974,7 @@
         'base/sinc_resampler_unittest.cc',
         'base/test_data_util.cc',
         'base/test_data_util.h',
+        'base/user_input_monitor_unittest.cc',
         'base/vector_math_testing.h',
         'base/vector_math_unittest.cc',
         'base/video_frame_unittest.cc',