[wip] hack to use synthetic bfs for browser compositor

content/browser/renderer_host/render_widget_host_view_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/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include <utility>
 
@@ skipping 1083 matching lines @@
     cc::CompositorFrame frame) {
   last_scroll_offset_ = frame.metadata.root_scroll_offset;
   DCHECK(delegated_frame_host_);
 
   if (locks_on_frame_count_ > 0) {
     DCHECK(HasValidFrame());
     RetainFrame(compositor_frame_sink_id, std::move(frame));
     return;
   }
 
+  TRACE_EVENT0("cc", "RenderWidgetHostViewAndroid::SwapCompositorFrame");
+
   DCHECK(!frame.render_pass_list.empty());
 
   cc::RenderPass* root_pass = frame.render_pass_list.back().get();
   current_surface_size_ = root_pass->output_rect.size();
   bool is_transparent = root_pass->has_transparent_background;
 
   cc::CompositorFrameMetadata metadata = frame.metadata.Clone();
 
   CheckCompositorFrameSinkChanged(compositor_frame_sink_id);
   bool has_content = !current_surface_size_.IsEmpty();
@@ skipping 416 matching lines @@
   args.deadline = sync_compositor_ ? base::TimeTicks()
   : args.frame_time + (args.interval * 0.6);
   host_->Send(new ViewMsg_BeginFrame(host_->GetRoutingID(), args));
   if (sync_compositor_)
     sync_compositor_->DidSendBeginFrame(view_.GetWindowAndroid());
 }
 
 bool RenderWidgetHostViewAndroid::Animate(base::TimeTicks frame_time) {
   bool needs_animate = false;
   if (overscroll_controller_ && !is_in_vr_) {
+    TRACE_EVENT1("cc", "RenderWidgetHostViewAndroid::Animate", "frame_time",
+                 frame_time);
     needs_animate |= overscroll_controller_->Animate(
         frame_time, content_view_core_->GetViewAndroid()->GetLayer());
   }
   if (selection_controller_)
     needs_animate |= selection_controller_->Animate(frame_time);
   return needs_animate;
 }
 
 void RenderWidgetHostViewAndroid::RequestDisallowInterceptTouchEvent() {
   if (content_view_core_)
@@ skipping 517 matching lines @@
   ui::WindowAndroidCompositor* compositor = window_android->GetCompositor();
   if (!compositor)
     return;
 
   overscroll_controller_ = base::MakeUnique<OverscrollControllerAndroid>(
       overscroll_refresh_handler, compositor,
       ui::GetScaleFactorForNativeView(GetNativeView()));
 }
 
 }  // namespace content