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

content/browser/storage_partition_impl_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 <stddef.h>
 #include <stdint.h>
 
 #include "base/files/file_util.h"
 #include "base/location.h"
 #include "base/macros.h"
@@ skipping 583 matching lines @@
   scoped_refptr<MockQuotaManager> quota_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(StoragePartitionImplTest);
 };
 
 class StoragePartitionShaderClearTest : public testing::Test {
  public:
   StoragePartitionShaderClearTest()
       : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP),
         browser_context_(new TestBrowserContext()) {
+    ShaderCacheFactory::InitInstance(
+        base::ThreadTaskRunnerHandle::Get(),
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::CACHE));
     ShaderCacheFactory::GetInstance()->SetCacheInfo(
         kDefaultClientId,
         BrowserContext::GetDefaultStoragePartition(
             browser_context())->GetPath());
     cache_ = ShaderCacheFactory::GetInstance()->Get(kDefaultClientId);
   }
 
   ~StoragePartitionShaderClearTest() override {
     cache_ = NULL;
     ShaderCacheFactory::GetInstance()->RemoveCacheInfo(kDefaultClientId);
@@ skipping 698 matching lines @@
       CanonicalCookie::Create(url2, "A=B;domain=.example.com", now, options));
   invalid_cookies.push_back(CanonicalCookie::Create(url3, "A=B", now, options));
 
   for (const auto& cookie : valid_cookies)
     EXPECT_TRUE(predicate.Run(*cookie)) << cookie->DebugString();
   for (const auto& cookie : invalid_cookies)
     EXPECT_FALSE(predicate.Run(*cookie)) << cookie->DebugString();
 }
 
 }  // namespace content