Get rid of virtual Display::CreateScheduler.

content/browser/compositor/browser_compositor_output_surface.cc

Index: content/browser/compositor/browser_compositor_output_surface.cc
diff --git a/content/browser/compositor/browser_compositor_output_surface.cc b/content/browser/compositor/browser_compositor_output_surface.cc
index 3fa2f9ecc1e74060ce796dc4ccd8692926ad932e..b5fbbcf6eb6f04b87ecba1107267c7bb05c2a384 100644
--- a/content/browser/compositor/browser_compositor_output_surface.cc
+++ b/content/browser/compositor/browser_compositor_output_surface.cc
@@ -13,7 +13,7 @@
 #include "base/strings/string_number_conversions.h"
 #include "cc/base/switches.h"
 #include "cc/output/output_surface_client.h"
-#include "cc/scheduler/delay_based_time_source.h"
+#include "cc/scheduler/begin_frame_source.h"
 #include "components/display_compositor/compositor_overlay_candidate_validator.h"
 #include "content/browser/compositor/reflector_impl.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
@@ -23,13 +23,12 @@ namespace content {
 BrowserCompositorOutputSurface::BrowserCompositorOutputSurface(
     scoped_refptr<cc::ContextProvider> context_provider,
     scoped_refptr<ui::CompositorVSyncManager> vsync_manager,
-    base::SingleThreadTaskRunner* task_runner,
+    cc::SyntheticBeginFrameSource* begin_frame_source,
     std::unique_ptr<display_compositor::CompositorOverlayCandidateValidator>
         overlay_candidate_validator)
     : OutputSurface(std::move(context_provider), nullptr, nullptr),
       vsync_manager_(std::move(vsync_manager)),
-      synthetic_begin_frame_source_(new cc::DelayBasedBeginFrameSource(
-          base::MakeUnique<cc::DelayBasedTimeSource>(task_runner))),
+      synthetic_begin_frame_source_(begin_frame_source),
       reflector_(nullptr),
       use_begin_frame_scheduling_(
           base::CommandLine::ForCurrentProcess()->HasSwitch(
@@ -41,11 +40,10 @@ BrowserCompositorOutputSurface::BrowserCompositorOutputSurface(
 BrowserCompositorOutputSurface::BrowserCompositorOutputSurface(
     std::unique_ptr<cc::SoftwareOutputDevice> software_device,
     const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
-    base::SingleThreadTaskRunner* task_runner)
+    cc::SyntheticBeginFrameSource* begin_frame_source)
     : OutputSurface(nullptr, nullptr, std::move(software_device)),
       vsync_manager_(vsync_manager),
-      synthetic_begin_frame_source_(new cc::DelayBasedBeginFrameSource(
-          base::MakeUnique<cc::DelayBasedTimeSource>(task_runner))),
+      synthetic_begin_frame_source_(begin_frame_source),
       reflector_(nullptr),
       use_begin_frame_scheduling_(
           base::CommandLine::ForCurrentProcess()->HasSwitch(
@@ -56,11 +54,10 @@ BrowserCompositorOutputSurface::BrowserCompositorOutputSurface(
 BrowserCompositorOutputSurface::BrowserCompositorOutputSurface(
     const scoped_refptr<cc::VulkanContextProvider>& vulkan_context_provider,
     const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
-    base::SingleThreadTaskRunner* task_runner)
+    cc::SyntheticBeginFrameSource* begin_frame_source)
     : OutputSurface(std::move(vulkan_context_provider)),
       vsync_manager_(vsync_manager),
-      synthetic_begin_frame_source_(new cc::DelayBasedBeginFrameSource(
-          base::MakeUnique<cc::DelayBasedTimeSource>(task_runner))),
+      synthetic_begin_frame_source_(begin_frame_source),
       reflector_(nullptr) {
   Initialize();
 }
@@ -87,9 +84,6 @@ bool BrowserCompositorOutputSurface::BindToClient(
   if (!OutputSurface::BindToClient(client))
     return false;
 
-  // Pass begin frame source up to Display to use for DisplayScheduler.
-  client->SetBeginFrameSource(synthetic_begin_frame_source_.get());
-
   // Don't want vsync notifications until there is a client.
   if (!use_begin_frame_scheduling_)
     vsync_manager_->AddObserver(this);