cc: Remove BeginFrameSourcesConstructor.

cc/surfaces/display_unittest.cc

Index: cc/surfaces/display_unittest.cc
diff --git a/cc/surfaces/display_unittest.cc b/cc/surfaces/display_unittest.cc
index c0213905551f3e310e3a7616e50f7f851e69cc19..41d6c1a0354dbfbaec83ed41347047a77eeb63b7 100644
--- a/cc/surfaces/display_unittest.cc
+++ b/cc/surfaces/display_unittest.cc
@@ -66,6 +66,7 @@ class DisplayTest : public testing::Test {
   FakeOutputSurface* output_surface_ptr_;
   FakeBeginFrameSource fake_begin_frame_source_;
   scoped_ptr<SharedBitmapManager> shared_bitmap_manager_;
+  scoped_refptr<base::NullTaskRunner> task_runner_;
 };
 
 class TestDisplayClient : public DisplayClient {
@@ -82,11 +83,9 @@ class TestDisplayClient : public DisplayClient {
 class TestDisplayScheduler : public DisplayScheduler {
  public:
   TestDisplayScheduler(DisplaySchedulerClient* client,
-                       BeginFrameSource* begin_frame_source)
-      : DisplayScheduler(client,
-                         begin_frame_source,
-                         make_scoped_refptr(new base::NullTaskRunner),
-                         1),
+                       BeginFrameSource* begin_frame_source,
+                       base::NullTaskRunner* task_runner)
+      : DisplayScheduler(client, begin_frame_source, task_runner, 1),
         damaged(false),
         entire_display_damaged(false),
         swapped(false) {}
@@ -128,7 +127,8 @@ TEST_F(DisplayTest, DisplayDamaged) {
   Display display(&client, &manager_, shared_bitmap_manager_.get(), nullptr,
                   settings);
 
-  TestDisplayScheduler scheduler(&display, &fake_begin_frame_source_);
+  TestDisplayScheduler scheduler(&display, &fake_begin_frame_source_,
+                                 task_runner_.get());
   display.Initialize(output_surface_.Pass(), &scheduler);
 
   SurfaceId surface_id(7u);
@@ -335,7 +335,8 @@ TEST_F(DisplayTest, Finish) {
   Display display(&client, &manager_, shared_bitmap_manager_.get(), nullptr,
                   settings);
 
-  TestDisplayScheduler scheduler(&display, &fake_begin_frame_source_);
+  TestDisplayScheduler scheduler(&display, &fake_begin_frame_source_,
+                                 task_runner_.get());
   display.Initialize(output_surface_.Pass(), &scheduler);
 
   SurfaceId surface_id(7u);