[Background Fetch] Cleanup/fix thread safety

content/browser/background_fetch/background_fetch_test_base.cc

Index: content/browser/background_fetch/background_fetch_test_base.cc
diff --git a/content/browser/background_fetch/background_fetch_test_base.cc b/content/browser/background_fetch/background_fetch_test_base.cc
index 9314f19e96e0d83b7c51618bc1d88b115e0d4e58..548310228605b49154f8c860bf4de98bbc31e890 100644
--- a/content/browser/background_fetch/background_fetch_test_base.cc
+++ b/content/browser/background_fetch/background_fetch_test_base.cc
@@ -201,6 +201,7 @@ class BackgroundFetchTestBase::RespondingDownloadManager
 };
 
 BackgroundFetchTestBase::BackgroundFetchTestBase()
+    // TODO(johnme): Make this REAL_IO_THREAD to get coverage for thread safety.

[Peter Beverloo, 2017/07/10 13:13:21]

Is that ever going to happen? OK if you plan to work on this, otherwise please
remove it.

[johnme, 2017/07/10 13:41:07]

Changed this to explain why it's not REAL_IO_THREAD, rather than being a TODO.

     : thread_bundle_(TestBrowserThreadBundle::IO_MAINLOOP),
       origin_(GURL(kTestOrigin)) {}