Remove broken targets from "all" and "gn_all", under Windows component builds.

media/mojo/services/BUILD.gn

Index: media/mojo/services/BUILD.gn
diff --git a/media/mojo/services/BUILD.gn b/media/mojo/services/BUILD.gn
index 162d435d7be2f0417a65e96cc294ff1e91960115..f64a5e1f0f8f4cd1c1c3275e5ec570e69b795677 100644
--- a/media/mojo/services/BUILD.gn
+++ b/media/mojo/services/BUILD.gn
@@ -152,30 +152,35 @@ service("media") {
   ]
 }
 
-test("media_service_unittests") {
-  testonly = true
-
-  sources = [
-    "media_service_unittest.cc",
-  ]
+# crbug.com/676055: media_service_unittests currently fails to link in Windows
+# component builds, so don't declare it, otherwise the "all" target will still
+# try to build it.
+if (!(is_win && is_component_build)) {
+  test("media_service_unittests") {
+    testonly = true
+
+    sources = [
+      "media_service_unittest.cc",
+    ]
 
-  deps = [
-    "//media",
-    "//media/base:test_support",
-    "//media/mojo/clients",
-    "//media/mojo/common",
-    "//media/mojo/interfaces",
-    "//services/service_manager/public/cpp:service_test_support",
-    "//services/service_manager/public/cpp/test:run_all_service_tests",
-    "//testing/gmock",
-    "//testing/gtest",
-  ]
+    deps = [
+      "//media",
+      "//media/base:test_support",
+      "//media/mojo/clients",
+      "//media/mojo/common",
+      "//media/mojo/interfaces",
+      "//services/service_manager/public/cpp:service_test_support",
+      "//services/service_manager/public/cpp/test:run_all_service_tests",
+      "//testing/gmock",
+      "//testing/gtest",
+    ]
 
-  data_deps = [
-    ":media",
-    ":test_manifest",
-  ]
-}
+    data_deps = [
+      ":media",
+      ":test_manifest",
+    ]
+  }
+}  # !(is_win && is_component_build)
 
 service_manifest("media_manifest") {
   name = "media"