Fix initialization in MusBrowserCompositorOutputSurface

content/browser/compositor/mus_browser_compositor_output_surface.cc

 // Copyright 2016 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/mus_browser_compositor_output_surface.h"
 
 #include <utility>
 
 #include "cc/output/compositor_frame.h"
 #include "cc/output/output_surface_frame.h"
@@ skipping 14 matching lines @@
 MusBrowserCompositorOutputSurface::MusBrowserCompositorOutputSurface(
     ui::Window* window,
     scoped_refptr<ContextProviderCommandBuffer> context,
     gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
     const UpdateVSyncParametersCallback& update_vsync_parameters_callback,
     std::unique_ptr<display_compositor::CompositorOverlayCandidateValidator>
         overlay_candidate_validator)
     : GpuBrowserCompositorOutputSurface(std::move(context),
                                         update_vsync_parameters_callback,
                                         std::move(overlay_candidate_validator)),
-      ui_window_(window) {
+      ui_window_(window),
+      window_(nullptr) {
   ui_compositor_frame_sink_ = ui_window_->RequestCompositorFrameSink(
       ui::mojom::CompositorFrameSinkType::DEFAULT, context,
       gpu_memory_buffer_manager);
   ui_compositor_frame_sink_->BindToClient(this);
 }
 
 MusBrowserCompositorOutputSurface::MusBrowserCompositorOutputSurface(
     aura::Window* window,
     scoped_refptr<ContextProviderCommandBuffer> context,
     gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
     const UpdateVSyncParametersCallback& update_vsync_parameters_callback,
     std::unique_ptr<display_compositor::CompositorOverlayCandidateValidator>
         overlay_candidate_validator)
     : GpuBrowserCompositorOutputSurface(std::move(context),
                                         update_vsync_parameters_callback,
                                         std::move(overlay_candidate_validator)),
+      ui_window_(nullptr),
       window_(window) {
   aura::WindowPortMus* window_port = aura::WindowPortMus::Get(window_);
   DCHECK(window_port);
   compositor_frame_sink_ = window_port->RequestCompositorFrameSink(
       ui::mojom::CompositorFrameSinkType::DEFAULT, context,
       gpu_memory_buffer_manager);
   compositor_frame_sink_->BindToClient(this);
 }
 
 MusBrowserCompositorOutputSurface::~MusBrowserCompositorOutputSurface() {}
@@ skipping 134 matching lines @@
 
 const gpu::Mailbox& MusBrowserCompositorOutputSurface::GetMailboxFromResourceId(
     uint32_t id) {
   DCHECK_LT(id, mailboxes_.size());
   DCHECK(std::find(free_resource_ids_.begin(), free_resource_ids_.end(), id) ==
          free_resource_ids_.end());
   return mailboxes_[id];
 }
 
 }  // namespace content