DialogSurfaceManager implementation.

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index 5ea6e73f630275374987e73c104ef4b08aae1896..4361c6980fa3c157c34f95393d84b4132d2d1dec 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -1822,6 +1822,7 @@
             'base/android/java/src/org/chromium/media/MediaDrmBridge.java',
             'base/android/java/src/org/chromium/media/MediaPlayerBridge.java',
             'base/android/java/src/org/chromium/media/MediaPlayerListener.java',
+            'base/android/java/src/org/chromium/media/DialogSurfaceManagerWrapper.java',
           ],
           'variables': {
             'jni_gen_package': 'media',
@@ -1841,6 +1842,9 @@
             'base/android/audio_decoder_job.h',
             'base/android/audio_media_codec_decoder.cc',
             'base/android/audio_media_codec_decoder.h',
+            'base/android/dialog_surface.h',
+            'base/android/dialog_surface_manager.cc',
+            'base/android/dialog_surface_manager.h',
             'base/android/demuxer_android.h',
             'base/android/demuxer_stream_player_params.cc',
             'base/android/demuxer_stream_player_params.h',