Hook up ui::Compositor to Display's BeginFrameSource

content/browser/compositor/gpu_surfaceless_browser_compositor_output_surface.cc

 // Copyright 2014 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/compositor/gpu_surfaceless_browser_compositor_output_surface.h"
 
 #include <utility>
 
 #include "cc/output/compositor_frame.h"
 #include "cc/output/output_surface_client.h"
 #include "content/browser/compositor/browser_compositor_overlay_candidate_validator.h"
 #include "content/browser/compositor/buffer_queue.h"
 #include "content/browser/compositor/gl_helper.h"
 #include "content/browser/compositor/reflector_impl.h"
 #include "content/browser/gpu/gpu_surface_tracker.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
 #include "gpu/GLES2/gl2extchromium.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 
 namespace content {
 
 GpuSurfacelessBrowserCompositorOutputSurface::
     GpuSurfacelessBrowserCompositorOutputSurface(
         const scoped_refptr<ContextProviderCommandBuffer>& context,
         const scoped_refptr<ContextProviderCommandBuffer>& worker_context,
         int surface_id,
         const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
+        base::SingleThreadTaskRunner* task_runner,
         std::unique_ptr<BrowserCompositorOverlayCandidateValidator>
             overlay_candidate_validator,
         unsigned int target,
         unsigned int internalformat,
         gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager)
     : GpuBrowserCompositorOutputSurface(context,
                                         worker_context,
                                         vsync_manager,
+                                        task_runner,
                                         std::move(overlay_candidate_validator)),
       internalformat_(internalformat),
       gpu_memory_buffer_manager_(gpu_memory_buffer_manager) {
   capabilities_.uses_default_gl_framebuffer = false;
   capabilities_.flipped_output_surface = true;
   // Set |max_frames_pending| to 2 for surfaceless, which aligns scheduling
   // more closely with the previous surfaced behavior.
   // With a surface, swap buffer ack used to return early, before actually
   // presenting the back buffer, enabling the browser compositor to run ahead.
   // Surfaceless implementation acks at the time of actual buffer swap, which
@@ skipping 61 matching lines @@
     output_surface_->RecreateBuffers();
     force_swap = true;
   }
   GpuBrowserCompositorOutputSurface::OnGpuSwapBuffersCompleted(latency_info,
                                                                result);
   if (force_swap)
     client_->SetNeedsRedrawRect(gfx::Rect(SurfaceSize()));
 }
 
 }  // namespace content