Ping watchdog thread during GpuChannel destruction

gpu/command_buffer/service/memory_program_cache_unittest.cc

Index: gpu/command_buffer/service/memory_program_cache_unittest.cc
diff --git a/gpu/command_buffer/service/memory_program_cache_unittest.cc b/gpu/command_buffer/service/memory_program_cache_unittest.cc
index a4a78c6299078af5dd2595aaa5fc8fb84dce4e07..ced1211541e051775885823fa3db78968c8e9755 100644
--- a/gpu/command_buffer/service/memory_program_cache_unittest.cc
+++ b/gpu/command_buffer/service/memory_program_cache_unittest.cc
@@ -13,6 +13,7 @@
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/command_buffer/service/gpu_service_test.h"
+#include "gpu/command_buffer/service/progress_reporter_stub.h"
 #include "gpu/command_buffer/service/shader_manager.h"
 #include "gpu/command_buffer/service/shader_translator.h"
 #include "gpu/command_buffer/service/test_helper.h"
@@ -79,9 +80,11 @@ class MemoryProgramCacheTest : public GpuServiceTest {
       : cache_(new MemoryProgramCache(kCacheSizeBytes, kDisableGpuDiskCache)),
         vertex_shader_(NULL),
         fragment_shader_(NULL),
-        shader_cache_count_(0) {
+        shader_cache_count_(0) {}
+  ~MemoryProgramCacheTest() override {
+    ProgressReporterStub progress_reporter;
+    shader_manager_.Destroy(false, &progress_reporter);
   }
-  ~MemoryProgramCacheTest() override { shader_manager_.Destroy(false); }
 
   void ShaderCacheCb(const std::string& key, const std::string& shader) {
     shader_cache_count_++;