scheduler: Implement task observers

content/renderer/scheduler/null_renderer_scheduler.cc

Index: content/renderer/scheduler/null_renderer_scheduler.cc
diff --git a/content/renderer/scheduler/null_renderer_scheduler.cc b/content/renderer/scheduler/null_renderer_scheduler.cc
index 4ac7bd47a68f931e9e664d4cf189c07ce2822ecc..616103d9ca9742dd7d9c1ed67931b51ef0ab0f28 100644
--- a/content/renderer/scheduler/null_renderer_scheduler.cc
+++ b/content/renderer/scheduler/null_renderer_scheduler.cc
@@ -89,4 +89,14 @@ bool NullRendererScheduler::ShouldYieldForHighPriorityWork() {
 void NullRendererScheduler::Shutdown() {
 }
 
+void NullRendererScheduler::AddTaskObserver(
+    base::MessageLoop::TaskObserver* task_observer) {
+  base::MessageLoop::current()->AddTaskObserver(task_observer);
+}
+
+void NullRendererScheduler::RemoveTaskObserver(
+    base::MessageLoop::TaskObserver* task_observer) {
+  base::MessageLoop::current()->RemoveTaskObserver(task_observer);

[rmcilroy, 2015/02/13 12:53:21]

nit - move above shutdown

[Sami, 2015/02/13 14:27:26]

Done.

+}
+
 }  // namespace content