- Moving tests to use EmbeddedTestServer where possible.
- net::test_server::EmbeddedTestServer references to net::EmbeddedTestServer
- Using server.Start() instead of server.InitializeAndWaitUntilReady()
- Renaming test_server() to be spawned_test_server() or embedded_test_server()
- Enabling tests disabled due to SpawnedTestServer compatibility

BUG=496825
TBR=brettw@chromium.org,jochen@chromium.org

Review URL: https://codereview.chromium.org/1431653003

Cr-Commit-Position: refs/heads/master@{#360598}