Fixing and enhancing OrderedSimpleTaskRunner to allow 100% deterministic tests.

cc/scheduler/scheduler_state_machine.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_state_machine.h"
 
 #include "base/debug/trace_event.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
@@ skipping 145 matching lines @@
                          BeginImplFrameStateToString(begin_impl_frame_state_));
   major_state->SetString("commit_state", CommitStateToString(commit_state_));
   major_state->SetString("output_surface_state_",
                          OutputSurfaceStateToString(output_surface_state_));
   major_state->SetString(
       "forced_redraw_state",
       ForcedRedrawOnTimeoutStateToString(forced_redraw_state_));
   state->Set("major_state", major_state.release());
 
   scoped_ptr<base::DictionaryValue> timestamps_state(new base::DictionaryValue);
-  base::TimeTicks now = gfx::FrameTime::Now();
+  base::TimeTicks now = base::TimeTicks();  // gfx::FrameTime::Now();

[brianderson, 2014/07/17 05:26:03]

Why did this change?

[mithro-old, 2014/07/17 06:51:58]

Opps, this shouldn't be in this commit :)

   timestamps_state->SetDouble(
       "0_interval", begin_impl_frame_args_.interval.InMicroseconds() / 1000.0L);
   timestamps_state->SetDouble(
       "1_now_to_deadline",
       (begin_impl_frame_args_.deadline - now).InMicroseconds() / 1000.0L);
   timestamps_state->SetDouble(
       "2_frame_time_to_now",
       (now - begin_impl_frame_args_.frame_time).InMicroseconds() / 1000.0L);
   timestamps_state->SetDouble(
       "3_frame_time_to_deadline",
@@ skipping 893 matching lines @@
     case OUTPUT_SURFACE_ACTIVE:
     case OUTPUT_SURFACE_WAITING_FOR_FIRST_COMMIT:
     case OUTPUT_SURFACE_WAITING_FOR_FIRST_ACTIVATION:
       return true;
   }
   NOTREACHED();
   return false;
 }
 
 }  // namespace cc