[chromecast] Deletes libcast_media_1.0_default_core.

chromecast/media/BUILD.gn

Index: chromecast/media/BUILD.gn
diff --git a/chromecast/media/BUILD.gn b/chromecast/media/BUILD.gn
index f87e492674ec96f20ad908dddeb66f70a86a6aaa..cb27ae885bfd4ecce0f18baa37be2cd96083545c 100644
--- a/chromecast/media/BUILD.gn
+++ b/chromecast/media/BUILD.gn
@@ -62,37 +62,10 @@ test("cast_media_unittests") {
     "//ui/gfx/geometry",
   ]
 
-  if (chromecast_branding == "public") {
-    # Link default libcast_media_1.0 statically not to link dummy one
-    # dynamically for public unittests.
-    deps += [ "//chromecast/media/base:libcast_media_1.0_default_core" ]
-  }
-}
-
-test("cast_multizone_backend_unittests") {
-  sources = [
-    "cma/backend/multizone_backend_unittest.cc",
-    "cma/test/run_all_unittests.cc",
-  ]
-
-  deps = [
-    "//base",
-    "//base/test:test_support",
-    "//chromecast/base",
-    "//chromecast/base/metrics:test_support",
-    "//chromecast/media/base:libcast_media_1.0",
-    "//chromecast/media/cma/backend",
-    "//chromecast/media/cma/base",
-    "//chromecast/public",
-    "//media",
-    "//media/base:test_support",
-    "//testing/gmock",
-    "//testing/gtest",
-  ]
-
-  if (chromecast_branding == "public") {
-    # Link default libcast_media_1.0 statically not to link dummy one
-    # dynamically for public unittests.
-    deps += [ "//chromecast/media/base:libcast_media_1.0_default_core" ]
+  # MultizoneBackendTest verifies rendering delay reported by the backend.
+  # Since rendering delay is optional on video platforms, enable this test
+  # on audio devices only.
+  if (is_cast_audio_only) {
+    sources += [ "cma/backend/multizone_backend_unittest.cc" ]
   }
 }