gpu shader cache: Clarify lifetime/ownership/threadiness of objects.

content/browser/gpu/shader_disk_cache_unittest.cc

 // Copyright 2013 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 "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/threading/thread.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/gpu/shader_disk_cache.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "net/base/test_completion_callback.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 namespace {
 
 const int kDefaultClientId = 42;
 const char kCacheKey[] = "key";
 const char kCacheValue[] = "cached value";
 
 }  // namespace
 
 class ShaderDiskCacheTest : public testing::Test {
  public:
   ShaderDiskCacheTest()
       : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP) {
+    ShaderCacheFactory::InitInstance(
+        base::ThreadTaskRunnerHandle::Get(),
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::CACHE));
   }
 
   ~ShaderDiskCacheTest() override {}
 
   const base::FilePath& cache_path() { return temp_dir_.GetPath(); }
 
   void InitCache() {
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     ShaderCacheFactory::GetInstance()->SetCacheInfo(kDefaultClientId,
                                                         cache_path());
@@ skipping 30 matching lines @@
   EXPECT_EQ(1, cache->Size());
 
   base::Time time;
   net::TestCompletionCallback clear_cb;
   rv = cache->Clear(time, time, clear_cb.callback());
   ASSERT_EQ(net::OK, clear_cb.GetResult(rv));
   EXPECT_EQ(0, cache->Size());
 };
 
 }  // namespace content