Rename media::Clock to media::TimeDeltaInterpolator and update API.

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index 8ad6aa92e0afd35b128172e175f5872cbad43086..58adf56e29175b2764b4c2384e78f67ae98b8a63 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -256,8 +256,6 @@
         'base/cdm_promise.h',
         'base/channel_mixer.cc',
         'base/channel_mixer.h',
-        'base/clock.cc',
-        'base/clock.h',
         'base/container_names.cc',
         'base/container_names.h',
         'base/data_buffer.cc',
@@ -334,6 +332,8 @@
         'base/text_track.h',
         'base/text_track_config.cc',
         'base/text_track_config.h',
+        'base/time_delta_interpolator.cc',
+        'base/time_delta_interpolator.h',
         'base/user_input_monitor.cc',
         'base/user_input_monitor.h',
         'base/user_input_monitor_linux.cc',
@@ -1077,7 +1077,6 @@
         'base/callback_holder.h',
         'base/callback_holder_unittest.cc',
         'base/channel_mixer_unittest.cc',
-        'base/clock_unittest.cc',
         'base/container_names_unittest.cc',
         'base/data_buffer_unittest.cc',
         'base/decoder_buffer_queue_unittest.cc',
@@ -1096,6 +1095,7 @@
         'base/stream_parser_unittest.cc',
         'base/text_ranges_unittest.cc',
         'base/text_renderer_unittest.cc',
+        'base/time_delta_interpolator_unittest.cc',
         'base/user_input_monitor_unittest.cc',
         'base/vector_math_testing.h',
         'base/vector_math_unittest.cc',