Fix gn check in content_unittest when enable_webrtc=false

content/test/BUILD.gn

Index: content/test/BUILD.gn
diff --git a/content/test/BUILD.gn b/content/test/BUILD.gn
index 54c640319b36afaf9005399e0f82cb726dec9f34..b058697dff4d85bf1a20001d79aeab95502664e4 100644
--- a/content/test/BUILD.gn
+++ b/content/test/BUILD.gn
@@ -664,6 +664,7 @@ test("content_unittests") {
     "//media:test_support",
     "//media/audio:test_support",
     "//media/base:test_support",
+    "//media/blink",
     "//media/capture",
     "//media/midi:midi",
     "//mojo/edk/test:test_support",
@@ -728,7 +729,6 @@ test("content_unittests") {
                     ".",
                     "//content")
     deps += [
-      "//media/blink",
       "//third_party/libjingle:libjingle_webrtc",
       "//third_party/webrtc/api:libjingle_peerconnection",
       "//third_party/webrtc/base:rtc_base",