Remove gfx::FrameTime for a single clock source

cc/scheduler/begin_frame_source.cc

 // Copyright 2014 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/begin_frame_source.h"
 
 #include "base/auto_reset.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "cc/scheduler/delay_based_time_source.h"
 #include "cc/scheduler/scheduler.h"
-#include "ui/gfx/frame_time.h"
 
 #ifdef NDEBUG
 #define DEBUG_FRAMES(...)
 #else
 #define DEBUG_FRAMES(name, arg1_name, arg1_val, arg2_name, arg2_val)   \
   TRACE_EVENT2(TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler.frames"), \
                name,                                                   \
                arg1_name,                                              \
                arg1_val,                                               \
                arg2_name,                                              \
@@ skipping 126 matching lines @@
       weak_factory_(this) {
   DCHECK(task_runner);
   DCHECK_EQ(needs_begin_frames_, false);
   DCHECK_EQ(send_begin_frame_posted_, false);
 }
 
 BackToBackBeginFrameSource::~BackToBackBeginFrameSource() {
 }
 
 base::TimeTicks BackToBackBeginFrameSource::Now() {
-  return gfx::FrameTime::Now();
+  return base::TimeTicks::Now();
 }
 
 void BackToBackBeginFrameSource::OnNeedsBeginFramesChange(
     bool needs_begin_frames) {
   if (!needs_begin_frames)
     return;
 
   if (send_begin_frame_posted_)
     return;
 
@@ skipping 31 matching lines @@
   BeginFrameSourceMixIn::AsValueInto(dict);
   dict->SetBoolean("send_begin_frame_posted_", send_begin_frame_posted_);
 }
 
 // SyntheticBeginFrameSource ---------------------------------------------
 scoped_ptr<SyntheticBeginFrameSource> SyntheticBeginFrameSource::Create(
     base::SingleThreadTaskRunner* task_runner,
     base::TimeTicks initial_vsync_timebase,
     base::TimeDelta initial_vsync_interval) {
   scoped_refptr<DelayBasedTimeSource> time_source;
-  if (gfx::FrameTime::TimestampsAreHighRes()) {
+  if (base::TimeTicks::IsHighResolution()) {
     time_source = DelayBasedTimeSourceHighRes::Create(initial_vsync_interval,

[brianderson, 2015/05/22 19:20:56]

We can also get rid of this if block and remove the DelayBasedTimeSourceHighRes
class altogether now.

Feel free to remove it in this patch or open a followup bug.

                                                       task_runner);
   } else {
     time_source =
         DelayBasedTimeSource::Create(initial_vsync_interval, task_runner);
   }
 
   return make_scoped_ptr(new SyntheticBeginFrameSource(time_source));
 }
 
 SyntheticBeginFrameSource::SyntheticBeginFrameSource(
@@ skipping 243 matching lines @@
   if (!observer_->LastUsedBeginFrameArgs().IsValid())
     return true;
 
   // Only allow new args have a *strictly bigger* frame_time value and statisfy
   // minimum interval requirement.
   return (args.frame_time >=
           observer_->LastUsedBeginFrameArgs().frame_time + minimum_interval_);
 }
 
 }  // namespace cc