cc: Add BeginFrameArgs

cc/scheduler/scheduler.cc

Index: cc/scheduler/scheduler.cc
diff --git a/cc/scheduler/scheduler.cc b/cc/scheduler/scheduler.cc
index 7110bff7c3ae3c2ea435580d3a1f9bd3fc2b402e..8f6b2dc451a8d71edd5c4ee95c985ccf437d4430 100644
--- a/cc/scheduler/scheduler.cc
+++ b/cc/scheduler/scheduler.cc
@@ -18,9 +18,6 @@ Scheduler::Scheduler(SchedulerClient* client,
       weak_factory_(this),
       last_set_needs_begin_frame_(false),
       has_pending_begin_frame_(false),
-      last_begin_frame_time_(base::TimeTicks()),
-      // TODO(brianderson): Pass with BeginFrame in the near future.
-      interval_(base::TimeDelta::FromMicroseconds(16666)),
       state_machine_(scheduler_settings),
       inside_process_scheduled_actions_(false) {
   DCHECK(client_);
@@ -110,13 +107,21 @@ void Scheduler::DidCreateAndInitializeOutputSurface() {
 
 base::TimeTicks Scheduler::AnticipatedDrawTime() {
   TRACE_EVENT0("cc", "Scheduler::AnticipatedDrawTime");
+
+  // TODO(brianderson): Express this in terms of the deadline.
   base::TimeTicks now = base::TimeTicks::Now();
-  int64 intervals = ((now - last_begin_frame_time_) / interval_) + 1;
-  return last_begin_frame_time_ + (interval_ * intervals);
+
+  if (last_begin_frame_args_.interval() <= base::TimeDelta())
+    return now;
+
+  int64 intervals = 1 + ((now - last_begin_frame_args_.frame_time()) /
+                         last_begin_frame_args_.interval());
+  return last_begin_frame_args_.frame_time() +
+      (last_begin_frame_args_.interval() * intervals);
 }
 
 base::TimeTicks Scheduler::LastBeginFrameOnImplThreadTime() {
-  return last_begin_frame_time_;
+  return last_begin_frame_args_.frame_time();
 }
 
 void Scheduler::SetupNextBeginFrameIfNeeded() {
@@ -141,13 +146,12 @@ void Scheduler::SetupNextBeginFrameIfNeeded() {
   }
 }
 
-void Scheduler::BeginFrame(base::TimeTicks frame_time) {
+void Scheduler::BeginFrame(BeginFrameArgs args) {
   TRACE_EVENT0("cc", "Scheduler::BeginFrame");
   DCHECK(!has_pending_begin_frame_);
   has_pending_begin_frame_ = true;
-  last_begin_frame_time_ = frame_time;
-  state_machine_.DidEnterBeginFrame();
-  state_machine_.SetFrameTime(frame_time);
+  last_begin_frame_args_ = args;
+  state_machine_.DidEnterBeginFrame(args);
   ProcessScheduledActions();
   state_machine_.DidLeaveBeginFrame();
 }