cc/blimp: Add synchronization for scroll/scale state.

blimp/engine/renderer/frame_scheduler.cc

 // Copyright 2016 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 "base/auto_reset.h"
 #include "base/logging.h"
 #include "blimp/engine/renderer/frame_scheduler.h"
 
 namespace blimp {
 namespace engine {
 namespace {
 // This is the temporary frame delay to keep pages which make animation requests
 // but don't mutate the state on the engine from running main frames
 // back-to-back. We need smarter throttling of engine updates. See
 // crbug.com/597829.
 constexpr base::TimeDelta kDefaultFrameDelay =
     base::TimeDelta::FromMilliseconds(30);
 }  // namespace
 
 FrameScheduler::FrameScheduler(
     scoped_refptr<base::SingleThreadTaskRunner> task_runner,
     FrameSchedulerClient* client)
-    : FrameScheduler(kDefaultFrameDelay, std::move(task_runner), client) {}
-
-FrameScheduler::FrameScheduler(
-    base::TimeDelta frame_delay,
-    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
-    FrameSchedulerClient* client)
     : next_frame_time_(base::TimeTicks::Now()),
-      frame_delay_(frame_delay),
+      frame_delay_(kDefaultFrameDelay),
       client_(client) {
   DCHECK(client_);
   frame_tick_timer_.SetTaskRunner(std::move(task_runner));
 }
 
 FrameScheduler::~FrameScheduler() = default;
 
 void FrameScheduler::ScheduleFrameUpdate() {
   if (needs_frame_update_)
     return;
@@ skipping 49 matching lines @@
   needs_frame_update_ = false;
   next_frame_time_ = base::TimeTicks::Now() + frame_delay_;
   {
     base::AutoReset<bool> in_frame_update(&in_frame_update_, true);
     client_->StartFrameUpdate();
   }
 }
 
 }  // namespace engine
 }  // namespace blimp