Add some printf debugging to narrow CreateAndReleaseOutputSurface crash

ui/compositor/compositor_unittest.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 <stdint.h>
 
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/test/test_mock_time_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 299 matching lines @@
 
 TEST_F(CompositorTestWithMockedTime,
        ReleaseWidgetWithOutputSurfaceNeverCreated) {
   compositor()->SetVisible(false);
   EXPECT_EQ(gfx::kNullAcceleratedWidget,
             compositor()->ReleaseAcceleratedWidget());
   compositor()->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
   compositor()->SetVisible(true);
 }
 
-#if defined(OS_WIN)
-// TODO(crbug.com/608436): Flaky on windows trybots
-#define MAYBE_CreateAndReleaseOutputSurface \
-  DISABLED_CreateAndReleaseOutputSurface
-#else
-#define MAYBE_CreateAndReleaseOutputSurface CreateAndReleaseOutputSurface
-#endif
-TEST_F(CompositorTestWithMessageLoop, MAYBE_CreateAndReleaseOutputSurface) {
+TEST_F(CompositorTestWithMessageLoop, CreateAndReleaseOutputSurface) {
+  LOG(ERROR) << "> Setup";
   std::unique_ptr<Layer> root_layer(new Layer(ui::LAYER_SOLID_COLOR));
   root_layer->SetBounds(gfx::Rect(10, 10));
   compositor()->SetRootLayer(root_layer.get());
   compositor()->SetScaleAndSize(1.0f, gfx::Size(10, 10));
-  DCHECK(compositor()->IsVisible());
+  ASSERT_TRUE(compositor()->IsVisible());
+  LOG(ERROR) << "< Setup";
+
+  LOG(ERROR) << "> ScheduleDraw 1";
   compositor()->ScheduleDraw();
   DrawWaiterForTest::WaitForCompositingEnded(compositor());
+  LOG(ERROR) << "< ScheduleDraw 1";
+
+  // Go invisible and release the widget.
+  LOG(ERROR) << "> SetVisible(false)";
   compositor()->SetVisible(false);
+  LOG(ERROR) << "< SetVisible(false)";
+  LOG(ERROR) << "> ReleaseAcceleratedWidget";
   EXPECT_EQ(gfx::kNullAcceleratedWidget,
             compositor()->ReleaseAcceleratedWidget());
+  LOG(ERROR) << "< ReleaseAcceleratedWidget";
+
+  // Set a new widget and become visible again.
+  LOG(ERROR) << "> SetAcceleratedWidget";
   compositor()->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
+  LOG(ERROR) << "< SetAcceleratedWidget";
+  LOG(ERROR) << "> SetVisible(true)";
   compositor()->SetVisible(true);
+  LOG(ERROR) << "< SetVisible(true)";
+
+  LOG(ERROR) << "> ScheduleDraw 2";
   compositor()->ScheduleDraw();
+  LOG(ERROR) << "< ScheduleDraw 2";
+  LOG(ERROR) << "> Wait for draw 2";
   DrawWaiterForTest::WaitForCompositingEnded(compositor());
+  LOG(ERROR) << "< Wait for draw 2";
+
   compositor()->SetRootLayer(nullptr);
 }
 
 }  // namespace ui