Remove wtf/Functional.h

sky/viewer/platform/platform_impl.cc

Index: sky/viewer/platform/platform_impl.cc
diff --git a/sky/viewer/platform/platform_impl.cc b/sky/viewer/platform/platform_impl.cc
index 637849a2e3e239bb73b07cf39aff836f4b7a5e22..d4b47d8844fe4894aeea21b8160d3f08691ba447 100644
--- a/sky/viewer/platform/platform_impl.cc
+++ b/sky/viewer/platform/platform_impl.cc
@@ -41,6 +41,7 @@ class ConvertableToTraceFormatWrapper
 
 PlatformImpl::PlatformImpl(mojo::ApplicationImpl* app)
     : main_loop_(base::MessageLoop::current()),
+      main_thread_task_runner_(base::MessageLoop::current()->task_runner()),
       shared_timer_func_(NULL),
       shared_timer_fire_time_(0.0),
       shared_timer_fire_time_was_set_while_suspended_(false),
@@ -123,6 +124,11 @@ void PlatformImpl::callOnMainThread(
   main_loop_->PostTask(FROM_HERE, base::Bind(func, context));
 }
 
+base::SingleThreadTaskRunner* PlatformImpl::mainThreadTaskRunner() {
+  return main_thread_task_runner_.get();
+}
+
+
 bool PlatformImpl::isThreadedCompositingEnabled() {
   return true;
 }