GTTF: Remove message loop hooks from TestLauncherDelegate

content/public/test/test_utils.h

Index: content/public/test/test_utils.h
===================================================================
--- content/public/test/test_utils.h	(revision 202993)
+++ content/public/test/test_utils.h	(working copy)
@@ -34,6 +34,13 @@
 // Variant of RunMessageLoop that takes RunLoop.
 void RunThisRunLoop(base::RunLoop* run_loop);
 
+// Adds pre/post hooks to call when running a message loop.
+// DEPRECATED: Please do not use in new code.
+// TODO(phajdan.jr): Remove message loop hooks after switch to Aura.
+typedef base::Callback<void(base::RunLoop*)> RunMessageLoopHook;
+void AddPreRunMessageLoopHook(const RunMessageLoopHook& hook);
+void AddPostRunMessageLoopHook(const RunMessageLoopHook& hook);
+
 // Turns on nestable tasks, runs all pending tasks in the message loop,
 // then resets nestable tasks to what they were originally. Prefer this
 // over MessageLoop::RunAllPending for in process browser tests to run