cc: add more devtools instrumentation

cc/scheduler/scheduler.cc

 // Copyright 2011 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/scheduler/scheduler.h"
 
 #include <algorithm>
 #include "base/auto_reset.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 198 matching lines @@
 }
 
 void Scheduler::BeginImplFrame(const BeginFrameArgs& args) {
   TRACE_EVENT0("cc", "Scheduler::BeginImplFrame");
   DCHECK(state_machine_.begin_impl_frame_state() ==
          SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_IDLE);
   DCHECK(state_machine_.HasInitializedOutputSurface());
   last_begin_impl_frame_args_ = args;
   last_begin_impl_frame_args_.deadline -= client_->DrawDurationEstimate();
   state_machine_.OnBeginImplFrame(last_begin_impl_frame_args_);
+  devtools_instrumentation::didBeginFrame(layer_tree_host_id_);
 
   if (settings_.switch_to_low_latency_if_possible) {
     state_machine_.SetSkipBeginMainFrameToReduceLatency(
         state_machine_.MainThreadIsInHighLatencyMode() &&
             CanCommitAndActivateBeforeDeadline());
   }
 
   ProcessScheduledActions();
 
   if (!state_machine_.HasInitializedOutputSurface())
     return;
 
   state_machine_.OnBeginImplFrameDeadlinePending();
-  devtools_instrumentation::didBeginFrame(layer_tree_host_id_);
   if (settings_.using_synchronous_renderer_compositor) {
     // The synchronous renderer compositor has to make its GL calls
     // within this call to BeginImplFrame.
     // TODO(brianderson): Have the OutputSurface initiate the deadline tasks
     // so the sychronous renderer compositor can take advantage of splitting
     // up the BeginImplFrame and deadline as well.
     OnBeginImplFrameDeadline();
   } else if (!settings_.deadline_scheduling_enabled) {
     // We emulate the old non-deadline scheduler here by posting the
     // deadline task without any delay.
@@ skipping 144 matching lines @@
   // impl thread's deadline.
   base::TimeTicks estimated_draw_time =
       last_begin_impl_frame_args_.frame_time +
       client_->BeginMainFrameToCommitDurationEstimate() +
       client_->CommitToActivateDurationEstimate();
 
   return estimated_draw_time < last_begin_impl_frame_args_.deadline;
 }
 
 }  // namespace cc