Update from https://crrev.com/307664

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/debug/trace_event.h"
 #include "base/debug/trace_event_argument.h"
 #include "base/location.h"
@@ skipping 128 matching lines @@
 
 // BackToBackBeginFrameSourceMixIn --------------------------------------------
 scoped_ptr<BackToBackBeginFrameSource> BackToBackBeginFrameSource::Create(
     base::SingleThreadTaskRunner* task_runner) {
   return make_scoped_ptr(new BackToBackBeginFrameSource(task_runner));
 }
 
 BackToBackBeginFrameSource::BackToBackBeginFrameSource(
     base::SingleThreadTaskRunner* task_runner)
     : BeginFrameSourceMixIn(),
-      weak_factory_(this),
       task_runner_(task_runner),
-      send_begin_frame_posted_(false) {
+      send_begin_frame_posted_(false),
+      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();
@@ skipping 321 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