Unified BeginFrame scheduling

cc/trees/layer_tree_host.cc

 // Copyright 2011 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/trees/layer_tree_host.h"
 
 #include <algorithm>
 #include <stack>
 #include <string>
 
@@ skipping 104 matching lines @@
       has_gpu_rasterization_trigger_(false),
       content_is_suitable_for_gpu_rasterization_(true),
       gpu_rasterization_histogram_recorded_(false),
       background_color_(SK_ColorWHITE),
       has_transparent_background_(false),
       partial_texture_update_requests_(0),
       in_paint_layer_contents_(false),
       total_frames_used_for_lcd_text_metrics_(0),
       id_(s_layer_tree_host_sequence_number.GetNext() + 1),
       next_commit_forces_redraw_(false),
-      shared_bitmap_manager_(manager) {
+      shared_bitmap_manager_(manager),
+      begin_frame_requested_(false) {
   if (settings_.accelerated_animation_enabled)
     animation_registrar_ = AnimationRegistrar::Create();
   rendering_stats_instrumentation_->set_record_rendering_stats(
       debug_state_.RecordRenderingStats());
 }
 
 void LayerTreeHost::InitializeThreaded(
     scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner) {
   InitializeProxy(
@@ skipping 1152 matching lines @@
   DCHECK(swap_promise);
   swap_promise_list_.push_back(swap_promise.Pass());
 }
 
 void LayerTreeHost::BreakSwapPromises(SwapPromise::DidNotSwapReason reason) {
   for (size_t i = 0; i < swap_promise_list_.size(); i++)
     swap_promise_list_[i]->DidNotSwap(reason);
   swap_promise_list_.clear();
 }
 
+void LayerTreeHost::SendBeginFrame(const BeginFrameArgs& args) {
+  begin_frame_requested_ = false;
+  client_->SendBeginFrame(args);
+}
+
+void LayerTreeHost::RequestBeginFrame() {
+  // If next BeginFrame is already requested, we can use it.
+  if (begin_frame_requested_)
+    return;
+  begin_frame_requested_ = true;
+  proxy_->BeginFrameRequested();
+}
+
 }  // namespace cc