Define a new media_cast component for iOS cast builds

media/cast/cast.gyp

Index: media/cast/cast.gyp
diff --git a/media/cast/cast.gyp b/media/cast/cast.gyp
index b646455c43fdfa7398bcc26448d3b32c63629401..38fd9807d0250b86627d033538e0d963abba832a 100644
--- a/media/cast/cast.gyp
+++ b/media/cast/cast.gyp
@@ -6,6 +6,7 @@
   'variables': {
     'include_tests%': 1,
     'chromium_code': 1,
+    'cast_use_media_cast%': 0,
   },
   'conditions': [
     ['include_tests==1', {
@@ -91,11 +92,8 @@
         'cast_base',
         'cast_net',
         '<(DEPTH)/base/base.gyp:base',
-        '<(DEPTH)/media/media.gyp:media',
-        '<(DEPTH)/media/media.gyp:shared_memory_support',
         '<(DEPTH)/third_party/opus/opus.gyp:opus',
         '<(DEPTH)/third_party/libvpx/libvpx.gyp:libvpx',
-        '<(DEPTH)/ui/gfx/gfx.gyp:gfx_geometry',
       ],
       'sources': [
         'cast_receiver.h',
@@ -120,6 +118,13 @@
         'net/rtp/rtp_receiver_defines.cc',
         'net/rtp/rtp_receiver_defines.h',
       ], # source
+      'conditions': [
+        ['cast_use_media_cast==1', {
+          'dependencies': ['<(DEPTH)/media/media.gyp:media_cast']
+        }, {  # cast_use_media_cast==1
+          'dependencies': ['<(DEPTH)/media/media.gyp:media']
+        }],
+      ], # conditions
     },
     {
       # GN version: //media/cast:sender
@@ -131,8 +136,6 @@
       'dependencies': [
         'cast_base',
         'cast_net',
-        '<(DEPTH)/media/media.gyp:media',
-        '<(DEPTH)/media/media.gyp:shared_memory_support',
         '<(DEPTH)/third_party/opus/opus.gyp:opus',
         '<(DEPTH)/third_party/libvpx/libvpx.gyp:libvpx',
       ], # dependencies
@@ -150,7 +153,7 @@
         'sender/external_video_encoder.cc',
         'sender/fake_software_video_encoder.h',
         'sender/fake_software_video_encoder.cc',
-	'sender/frame_sender.cc',
+        'sender/frame_sender.cc',
         'sender/frame_sender.h',
         'sender/software_video_encoder.h',
         'sender/video_encoder.h',
@@ -161,6 +164,13 @@
         'sender/vp8_encoder.cc',
         'sender/vp8_encoder.h',
       ], # source
+      'conditions': [
+        ['cast_use_media_cast==1', {
+          'dependencies': ['<(DEPTH)/media/media.gyp:media_cast']
+        }, {  # cast_use_media_cast==1
+          'dependencies': ['<(DEPTH)/media/media.gyp:media']
+        }],
+      ], # conditions
     },
     {
       # GN version: //media/cast:net