Ozone: Dont hardcode format to YUV when using Overlay Composition.

ui/ozone/platform/drm/gpu/drm_window_unittest.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 <stdint.h>
 
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 82 matching lines @@
   buffer_generator_.reset(new ui::MockDumbBufferGenerator());
   screen_manager_.reset(new ui::ScreenManager(buffer_generator_.get()));
   screen_manager_->AddDisplayController(drm_, kDefaultCrtc, kDefaultConnector);
   screen_manager_->ConfigureDisplayController(
       drm_, kDefaultCrtc, kDefaultConnector, gfx::Point(), kDefaultMode);
 
   drm_device_manager_.reset(new ui::DrmDeviceManager(nullptr));
 
   scoped_ptr<ui::DrmWindow> window(new ui::DrmWindow(
       kDefaultWidgetHandle, drm_device_manager_.get(), screen_manager_.get()));
-  window->Initialize();
+  window->Initialize(buffer_generator_.get());
   window->SetBounds(
       gfx::Rect(gfx::Size(kDefaultMode.hdisplay, kDefaultMode.vdisplay)));
   screen_manager_->AddWindow(kDefaultWidgetHandle, std::move(window));
 }
 
 void DrmWindowTest::TearDown() {
   scoped_ptr<ui::DrmWindow> window =
       screen_manager_->RemoveWindow(kDefaultWidgetHandle);
   window->Shutdown();
   message_loop_.reset();
@@ skipping 64 matching lines @@
   EXPECT_EQ(1, on_swap_buffers_count_);
   EXPECT_EQ(gfx::SwapResult::SWAP_NAK_RECREATE_BUFFERS,
             last_swap_buffers_result_);
 
   window->SchedulePageFlip(
       std::vector<ui::OverlayPlane>(1, ui::OverlayPlane(plane)),
       base::Bind(&DrmWindowTest::OnSwapBuffers, base::Unretained(this)));
   EXPECT_EQ(2, on_swap_buffers_count_);
   EXPECT_EQ(gfx::SwapResult::SWAP_FAILED, last_swap_buffers_result_);
 }