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

blimp/engine/renderer/frame_scheduler.cc

Index: blimp/engine/renderer/frame_scheduler.cc
diff --git a/blimp/engine/renderer/frame_scheduler.cc b/blimp/engine/renderer/frame_scheduler.cc
index 1a74860e1757e412b7df2e7e906e2cec8f620d59..ece5ddee875bb98acb78ced06b43a77468175830 100644
--- a/blimp/engine/renderer/frame_scheduler.cc
+++ b/blimp/engine/renderer/frame_scheduler.cc
@@ -20,14 +20,8 @@ constexpr base::TimeDelta kDefaultFrameDelay =
 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));