Ping watchdog thread during GpuChannel destruction

gpu/command_buffer/service/progress_reporter_stub.h

Index: gpu/command_buffer/service/progress_reporter_stub.h
diff --git a/gpu/command_buffer/service/progress_reporter_stub.h b/gpu/command_buffer/service/progress_reporter_stub.h
new file mode 100644
index 0000000000000000000000000000000000000000..fb45b8757d9eb9cc5a352c84792b289ac83691ac
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+++ b/gpu/command_buffer/service/progress_reporter_stub.h
@@ -0,0 +1,22 @@
+// Copyright (c) 2016 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.
+
+#ifndef GPU_COMMAND_BUFFER_SERVICE_PROGRESS_REPORTER_STUB_H_
+#define GPU_COMMAND_BUFFER_SERVICE_PROGRESS_REPORTER_STUB_H_
+
+#include "gpu/command_buffer/service/progress_reporter.h"
+
+namespace gpu {
+namespace gles2 {
+
+// A no-op ProgressReporter implementation.
+class ProgressReporterStub : public ProgressReporter {
+ public:
+  void ReportProgress() override {}
+};
+
+}  // namespace gles2
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_SERVICE_PROGRESS_REPORTER_STUB_H_