Get rid of virtual Display::CreateScheduler.

cc/surfaces/display_scheduler.cc

 // Copyright 2015 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/surfaces/display_scheduler.h"
 
 #include <vector>
 
 #include "base/stl_util.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/output/output_surface.h"
 
 namespace cc {
 
-DisplayScheduler::DisplayScheduler(DisplaySchedulerClient* client,
-                                   BeginFrameSource* begin_frame_source,
+DisplayScheduler::DisplayScheduler(BeginFrameSource* begin_frame_source,
                                    base::SingleThreadTaskRunner* task_runner,
                                    int max_pending_swaps)
-    : client_(client),
-      begin_frame_source_(begin_frame_source),
+    : begin_frame_source_(begin_frame_source),
       task_runner_(task_runner),
       output_surface_lost_(false),
       root_surface_resources_locked_(true),
       inside_begin_frame_deadline_interval_(false),
       needs_draw_(false),
       expecting_root_surface_damage_because_of_resize_(false),
       all_active_child_surfaces_ready_to_draw_(false),
       pending_swaps_(0),
       max_pending_swaps_(max_pending_swaps),
       observing_begin_frame_source_(false),
       root_surface_damaged_(false),
       expect_damage_from_root_surface_(false),
       weak_ptr_factory_(this) {
   begin_frame_deadline_closure_ = base::Bind(
       &DisplayScheduler::OnBeginFrameDeadline, weak_ptr_factory_.GetWeakPtr());
 }
 
 DisplayScheduler::~DisplayScheduler() {
   if (observing_begin_frame_source_)
     begin_frame_source_->RemoveObserver(this);
 }
 
+void DisplayScheduler::SetClient(DisplaySchedulerClient* client) {
+  client_ = client;
+}
+
 // If we try to draw when the root surface resources are locked, the
 // draw will fail.
 void DisplayScheduler::SetRootSurfaceResourcesLocked(bool locked) {
   TRACE_EVENT1("cc", "DisplayScheduler::SetRootSurfaceResourcesLocked",
                "locked", locked);
   root_surface_resources_locked_ = locked;
   ScheduleBeginFrameDeadline();
 }
 
 // This is used to force an immediate swap before a resize.
@@ skipping 246 matching lines @@
 }
 
 void DisplayScheduler::DidSwapBuffersComplete() {
   pending_swaps_--;
   TRACE_EVENT_ASYNC_END1("cc", "DisplayScheduler:pending_swaps", this,
                          "pending_frames", pending_swaps_);
   ScheduleBeginFrameDeadline();
 }
 
 }  // namespace cc