cc: Making BeginFrameSources support multiple BeginFrameObservers.

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/logging.h"
@@ skipping 716 matching lines @@
 
   SetupPollingMechanisms();
 
   client_->DidAnticipatedDrawTimeChange(AnticipatedDrawTime());
 
   RescheduleBeginImplFrameDeadlineIfNeeded();
 
   SetupNextBeginFrameIfNeeded();
 }
 
-scoped_refptr<base::trace_event::ConvertableToTraceFormat> Scheduler::AsValue()
-    const {
+scoped_refptr<base::trace_event::ConvertableToTraceFormat>
+Scheduler::AsValue() {
   scoped_refptr<base::trace_event::TracedValue> state =
       new base::trace_event::TracedValue();
   AsValueInto(state.get());
   return state;
 }
 
-void Scheduler::AsValueInto(base::trace_event::TracedValue* state) const {
+void Scheduler::AsValueInto(base::trace_event::TracedValue* state) {
   state->BeginDictionary("state_machine");
   state_machine_.AsValueInto(state);
   state->EndDictionary();
 
   // Only trace frame sources when explicitly enabled - http://crbug.com/420607
   bool frame_tracing_enabled = false;
   TRACE_EVENT_CATEGORY_GROUP_ENABLED(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler.frames"),
       &frame_tracing_enabled);
   if (frame_tracing_enabled) {
@@ skipping 46 matching lines @@
                    client_->DrawDurationEstimate().InMillisecondsF());
   state->SetDouble(
       "begin_main_frame_to_commit_duration_estimate_ms",
       client_->BeginMainFrameToCommitDurationEstimate().InMillisecondsF());
   state->SetDouble(
       "commit_to_activate_duration_estimate_ms",
       client_->CommitToActivateDurationEstimate().InMillisecondsF());
   state->EndDictionary();
 }
 
-bool Scheduler::CanCommitAndActivateBeforeDeadline() const {
+bool Scheduler::CanCommitAndActivateBeforeDeadline() {
   // Check if the main thread computation and commit can be finished before the
   // impl thread's deadline.
   base::TimeTicks estimated_draw_time =
       begin_impl_frame_args_.frame_time +
       client_->BeginMainFrameToCommitDurationEstimate() +
       client_->CommitToActivateDurationEstimate();
 
   TRACE_EVENT2(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler"),
       "CanCommitAndActivateBeforeDeadline",
       "time_left_after_drawing_ms",
       (begin_impl_frame_args_.deadline - estimated_draw_time).InMillisecondsF(),
       "state",
       AsValue());
 
   return estimated_draw_time < begin_impl_frame_args_.deadline;
 }
 
 bool Scheduler::IsBeginMainFrameSentOrStarted() const {
   return (state_machine_.commit_state() ==
               SchedulerStateMachine::COMMIT_STATE_BEGIN_MAIN_FRAME_SENT ||
           state_machine_.commit_state() ==
               SchedulerStateMachine::COMMIT_STATE_BEGIN_MAIN_FRAME_STARTED);
 }
 
 }  // namespace cc