Don't adjust deadline for children BeginFrames

cc/scheduler/scheduler.cc

Index: cc/scheduler/scheduler.cc
diff --git a/cc/scheduler/scheduler.cc b/cc/scheduler/scheduler.cc
index 5ffd59c095e62e1c67acc15acf582acdb3ce0f2c..afc908d6a6d4baebf4d8eb84f11e9012a0e9bdb2 100644
--- a/cc/scheduler/scheduler.cc
+++ b/cc/scheduler/scheduler.cc
@@ -340,23 +340,15 @@ void Scheduler::SetupPollingMechanisms() {
 bool Scheduler::OnBeginFrameMixInDelegate(const BeginFrameArgs& args) {
   TRACE_EVENT1("cc,benchmark", "Scheduler::BeginFrame", "args", args.AsValue());
 
-  // Deliver BeginFrames to children.
-  if (state_machine_.children_need_begin_frames()) {
-    BeginFrameArgs adjusted_args_for_children(args);
-    // Adjust a deadline for child schedulers.
-    // TODO(simonhong): Once we have commitless update, we can get rid of
-    // BeginMainFrameToCommitDurationEstimate() +
-    // CommitToActivateDurationEstimate().
-    adjusted_args_for_children.deadline -=
-        (client_->BeginMainFrameToCommitDurationEstimate() +
-         client_->CommitToActivateDurationEstimate() +
-         client_->DrawDurationEstimate() + EstimatedParentDrawTime());
-    client_->SendBeginFramesToChildren(adjusted_args_for_children);
-  }
-
+  // TODO(brianderson): Adjust deadline in the DisplayScheduler.
   BeginFrameArgs adjusted_args(args);
   adjusted_args.deadline -= EstimatedParentDrawTime();
 
+  // Deliver BeginFrames to children.
+  // TODO(brianderson): Move this responsibility to the DisplayScheduler.
+  if (state_machine_.children_need_begin_frames())
+    client_->SendBeginFramesToChildren(adjusted_args);
+
   if (settings_.using_synchronous_renderer_compositor) {
     BeginImplFrameSynchronous(adjusted_args);
     return true;