Adds BeginFrameControl via DevTools.

cc/output/begin_frame_args.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/output/begin_frame_args.h"
 
 #include "base/trace_event/trace_event_argument.h"
 #include "cc/proto/base_conversions.h"
 
 namespace cc {
@@ skipping 11 matching lines @@
   }
   NOTREACHED();
   return "???";
 }
 
 BeginFrameArgs::BeginFrameArgs()
     : frame_time(base::TimeTicks()),
       deadline(base::TimeTicks()),
       interval(base::TimeDelta::FromMicroseconds(-1)),
       type(BeginFrameArgs::INVALID),
-      on_critical_path(true) {
-}
+      on_critical_path(true),
+      allow_latency_optimizations(true) {}
 
 BeginFrameArgs::BeginFrameArgs(base::TimeTicks frame_time,
                                base::TimeTicks deadline,
                                base::TimeDelta interval,
                                BeginFrameArgs::BeginFrameArgsType type)
     : frame_time(frame_time),
       deadline(deadline),
       interval(interval),
       type(type),
-      on_critical_path(true) {
-}
+      on_critical_path(true),
+      allow_latency_optimizations(true) {}
 
 BeginFrameArgs BeginFrameArgs::Create(BeginFrameArgs::CreationLocation location,
                                       base::TimeTicks frame_time,
                                       base::TimeTicks deadline,
                                       base::TimeDelta interval,
                                       BeginFrameArgs::BeginFrameArgsType type) {
   DCHECK_NE(type, BeginFrameArgs::INVALID);
   DCHECK_NE(type, BeginFrameArgs::BEGIN_FRAME_ARGS_TYPE_MAX);
 #ifdef NDEBUG
   return BeginFrameArgs(frame_time, deadline, interval, type);
@@ skipping 15 matching lines @@
 void BeginFrameArgs::AsValueInto(base::trace_event::TracedValue* state) const {
   state->SetString("type", "BeginFrameArgs");
   state->SetString("subtype", TypeToString(type));
   state->SetDouble("frame_time_us", frame_time.ToInternalValue());
   state->SetDouble("deadline_us", deadline.ToInternalValue());
   state->SetDouble("interval_us", interval.InMicroseconds());
 #ifndef NDEBUG
   state->SetString("created_from", created_from.ToString());
 #endif
   state->SetBoolean("on_critical_path", on_critical_path);
+  state->SetBoolean("allow_latency_optimizations", allow_latency_optimizations);
 }
 
 // This is a hard-coded deadline adjustment that assumes 60Hz, to be used in
 // cases where a good estimated draw time is not known. Using 1/3 of the vsync
 // as the default adjustment gives the Browser the last 1/3 of a frame to
 // produce output, the Renderer Impl thread the middle 1/3 of a frame to produce
 // ouput, and the Renderer Main thread the first 1/3 of a frame to produce
 // output.
 base::TimeDelta BeginFrameArgs::DefaultEstimatedParentDrawTime() {
   return base::TimeDelta::FromMicroseconds(16666 / 3);
 }
 
 base::TimeDelta BeginFrameArgs::DefaultInterval() {
   return base::TimeDelta::FromMicroseconds(16666);
 }
 
 }  // namespace cc