Plumb activation time to main

cc/output/begin_frame_args.cc

Index: cc/output/begin_frame_args.cc
diff --git a/cc/output/begin_frame_args.cc b/cc/output/begin_frame_args.cc
index bf41afa277dafb8600b530df9f9ee7f084db09dd..9809b9b9a839b755c26c950c0355f2db8f9985fe 100644
--- a/cc/output/begin_frame_args.cc
+++ b/cc/output/begin_frame_args.cc
@@ -26,12 +26,16 @@ const char* BeginFrameArgs::TypeToString(BeginFrameArgsType type) {
 constexpr uint64_t BeginFrameArgs::kInvalidFrameNumber;
 constexpr uint64_t BeginFrameArgs::kStartingFrameNumber;
 
+BeginFrameArgs::BeginFrameArgs(const BeginFrameArgs& other) = default;
+
 BeginFrameArgs::BeginFrameArgs()
     : frame_time(base::TimeTicks()),
       deadline(base::TimeTicks()),
       interval(base::TimeDelta::FromMicroseconds(-1)),
       sequence_number(kInvalidFrameNumber),
       source_id(0),
+      ready_to_activate_time(base::TimeTicks()),
+      ready_to_activate_source_frame_number(0),
       type(BeginFrameArgs::INVALID),
       on_critical_path(true) {}
 
@@ -46,6 +50,9 @@ BeginFrameArgs::BeginFrameArgs(uint32_t source_id,
       interval(interval),
       sequence_number(sequence_number),
       source_id(source_id),
+      // TODO: copy these
+      // ready_to_activate_time(ready_to_activate_time),
+      // ready_to_activate_source_frame_number(ready_to_activate_source_frame_number),
       type(type),
       on_critical_path(true) {
   DCHECK_LE(kStartingFrameNumber, sequence_number);
@@ -91,6 +98,11 @@ void BeginFrameArgs::AsValueInto(base::trace_event::TracedValue* state) const {
   state->SetString("created_from", created_from.ToString());
 #endif
   state->SetBoolean("on_critical_path", on_critical_path);
+  // TODO
+  // state->SetDouble("ready_to_activate_time_us",
+  // ready_to_activate_time.ToInternalValue());
+  // state->SetInteger("ready_to_activate_source_frame_number",
+  // ready_to_activate_source_frame_number);
 }
 
 // This is a hard-coded deadline adjustment that assumes 60Hz, to be used in