media/capture: Adding WebmMuxer class and unittests

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index 530643dffa27b36e66b2c731f800b45221d7c557..838cee4f52891ffdd32cffa02d6fbcd89b3973d4 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -16,9 +16,11 @@
         # Android and iOS don't use ffmpeg or libvpx.
         'media_use_ffmpeg%': 0,
         'media_use_libvpx%': 0,
+        'media_use_libwebm%': 0,
       }, {  # 'OS!="android" and OS!="ios"'
         'media_use_ffmpeg%': 1,
         'media_use_libvpx%': 1,
+        'media_use_libwebm%': 1,
       }],
       # Enable ALSA and Pulse for runtime selection.
       ['(OS=="linux" or OS=="freebsd" or OS=="solaris") and (embedded!=1 or (chromecast==1 and target_arch!="arm"))', {
@@ -260,7 +262,7 @@
         'base/cdm_factory.cc',
         'base/cdm_factory.h',
         'base/cdm_initialized_promise.cc',
-        'base/cdm_initialized_promise.h',        
+        'base/cdm_initialized_promise.h',
         'base/cdm_key_information.cc',
         'base/cdm_key_information.h',
         'base/cdm_promise.cc',
@@ -504,6 +506,8 @@
         'filters/vp8_parser.h',
         'filters/vpx_video_decoder.cc',
         'filters/vpx_video_decoder.h',
+        'filters/webm_muxer.cc',
+        'filters/webm_muxer.h',
         'filters/webvtt_util.h',
         'filters/wsola_internals.cc',
         'filters/wsola_internals.h',
@@ -691,6 +695,17 @@
             'filters/vpx_video_decoder.h',
           ],
         }],
+        ['media_use_libwebm==1', {
+          'dependencies': [
+            '<(DEPTH)/third_party/libwebm/libwebm.gyp:libwebm',
+          ],
+        }, {  # media_use_libwebm==0
+          # Exclude the sources that depend on libwebm.
+          'sources!': [
+            'filters/webm_muxer.cc',
+            'filters/webm_muxer.h',
+          ],
+        }],
         ['enable_browser_cdms==1', {
           'sources': [
             'base/browser_cdm.cc',
@@ -1225,6 +1240,7 @@
         'filters/video_renderer_algorithm_unittest.cc',
         'filters/vp8_bool_decoder_unittest.cc',
         'filters/vp8_parser_unittest.cc',
+        'filters/webm_muxer_unittest.cc',
         'formats/common/offset_byte_queue_unittest.cc',
         'formats/webm/cluster_builder.cc',
         'formats/webm/cluster_builder.h',
@@ -1280,6 +1296,17 @@
             'test/pipeline_integration_test_base.cc',
           ],
         }],
+        ['media_use_libwebm==1', {
+          'dependencies': [
+            '<(DEPTH)/third_party/libwebm/libwebm.gyp:libwebm',
+          ],
+        }, {  # media_use_libwebm==0
+          # Exclude the sources that depend on libwebm.
+          'sources!': [
+            'filters/webm_muxer_unittest.cc',
+          ],
+        }],
+
         ['(os_posix==1 and OS!="mac") or (OS=="win" and component!="shared_library" and win_use_allocator_shim==1)', {
           'conditions': [
             ['use_allocator!="none"', {