Ping watchdog thread during GpuChannel destruction

gpu/command_buffer/service/context_group_unittest.cc

 // Copyright (c) 2012 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 "gpu/command_buffer/service/context_group.h"
 
 #include <stdint.h>
 
 #include <memory>
 
@@ skipping 26 matching lines @@
 
   ContextGroupTest() {}
 
  protected:
   void SetUp() override {
     GpuServiceTest::SetUp();
     decoder_.reset(new MockGLES2Decoder());
     scoped_refptr<FeatureInfo> feature_info = new FeatureInfo;
     group_ = scoped_refptr<ContextGroup>(
         new ContextGroup(gpu_preferences_, NULL, NULL, NULL, NULL, feature_info,
-                         kBindGeneratesResource, nullptr));
+                         kBindGeneratesResource, nullptr, nullptr));
   }
 
   GpuPreferences gpu_preferences_;
   std::unique_ptr<MockGLES2Decoder> decoder_;
   scoped_refptr<ContextGroup> group_;
 };
 
 TEST_F(ContextGroupTest, Basic) {
   // Test it starts off uninitialized.
   EXPECT_EQ(0u, group_->max_vertex_attribs());
@@ skipping 86 matching lines @@
   EXPECT_TRUE(group_->renderbuffer_manager() == NULL);
   EXPECT_TRUE(group_->texture_manager() == NULL);
   EXPECT_TRUE(group_->program_manager() == NULL);
   EXPECT_TRUE(group_->shader_manager() == NULL);
 }
 
 }  // namespace gles2
 }  // namespace gpu