Fix jank on Android due to bad scheduler deadline

content/browser/renderer_host/compositor_impl_android.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/compositor_impl_android.h"
 
 #include <android/bitmap.h>
 #include <android/native_window_jni.h>
 #include <stdint.h>
 #include <unordered_set>
@@ skipping 182 matching lines @@
   DCHECK(obs);
   DCHECK(observers_.find(obs) != observers_.end());
 
   observers_.erase(obs);
   if (observers_.empty())
     compositor_->OnNeedsBeginFramesChange(false);
 }
 
 void ExternalBeginFrameSource::OnVSync(base::TimeTicks frame_time,
                                        base::TimeDelta vsync_period) {
-  base::TimeTicks deadline = std::max(base::TimeTicks::Now(), frame_time);
+  // frame time is in the past, so give the next vsync period as the deadline.
+  base::TimeTicks deadline = frame_time + vsync_period;
   last_begin_frame_args_ =
       cc::BeginFrameArgs::Create(BEGINFRAME_FROM_HERE, frame_time, deadline,
                                  vsync_period, cc::BeginFrameArgs::NORMAL);
   std::unordered_set<cc::BeginFrameObserver*> observers(observers_);
   for (auto* obs : observers)
     obs->OnBeginFrame(last_begin_frame_args_);
 }
 
 // Used to override capabilities_.adjust_deadline_for_parent to false
 class OutputSurfaceWithoutParent : public cc::OutputSurface {
@@ skipping 581 matching lines @@
 
   TRACE_EVENT0("compositor", "Compositor::SetNeedsAnimate");
   host_->SetNeedsAnimate();
 }
 
 bool CompositorImpl::HavePendingReadbacks() {
   return !readback_layer_tree_->children().empty();
 }
 
 }  // namespace content