Add gn dependency on rtc_task_runner.

content/browser/BUILD.gn

Index: content/browser/BUILD.gn
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index c8d27f5c2a01a8f7bb0171fabc6cd4f42d2ad90e..13bc9b3b803c30a35dfe17fac1e65f963c48f833 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -1518,6 +1518,7 @@ source_set("browser") {
       "//jingle:jingle_glue",
       "//third_party/libjingle/webrtc:libjingle_webrtc",
       "//third_party/webrtc/base:rtc_base",
+      "//third_party/webrtc/base:rtc_task_runner",

[Sergey Ulanov, 2017/02/16 19:38:13]

content code shouldn't depend on rtc_task_runner directly. I think you could
just make //jingle:notifier depend on it. I think that's the only place in
chromium that should depend on task_runner.

[nisse-chromium (ooo August 14), 2017/02/20 09:51:32]

Dropped this dependency.

       "//third_party/webrtc/media:rtc_media_base",
       "//third_party/webrtc/modules/desktop_capture:primitives",
     ]