Move worker_thread.h from content/public/child to content/public/renderer.

BUG=777007
[email protected]

Change-Id: Ib86bb52f632edb6bd7df80eede47184c9e232cc5
Reviewed-on: https://chromium-review.googlesource.com/732614
Reviewed-by: John Abd-El-Malek <[email protected]>
Reviewed-by: Kinuko Yasuda <[email protected]>
Commit-Queue: John Abd-El-Malek <[email protected]>
Cr-Commit-Position: refs/heads/master@{#510714}
diff --git a/extensions/renderer/worker_thread_dispatcher.cc b/extensions/renderer/worker_thread_dispatcher.cc
index 55698dd..2c6f86b 100644
--- a/extensions/renderer/worker_thread_dispatcher.cc
+++ b/extensions/renderer/worker_thread_dispatcher.cc
@@ -9,8 +9,8 @@
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread_local.h"
 #include "base/values.h"
-#include "content/public/child/worker_thread.h"
 #include "content/public/renderer/render_thread.h"
+#include "content/public/renderer/worker_thread.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension_messages.h"
 #include "extensions/common/feature_switch.h"