content: Move shader cache factory singleton into a separate file.

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/memory/ptr_util.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(),
+    factory_ = base::MakeUnique<ShaderCacheFactory>(
         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());
+    factory_->SetCacheInfo(kDefaultClientId, cache_path());
   }
 
+  ShaderCacheFactory* factory() { return factory_.get(); }
+
  private:
-  void TearDown() override {
-    ShaderCacheFactory::GetInstance()->RemoveCacheInfo(kDefaultClientId);
-  }
+  void TearDown() override { factory_->RemoveCacheInfo(kDefaultClientId); }
 
+  std::unique_ptr<ShaderCacheFactory> factory_;
   base::ScopedTempDir temp_dir_;
   content::TestBrowserThreadBundle thread_bundle_;
 
   DISALLOW_COPY_AND_ASSIGN(ShaderDiskCacheTest);
 };
 
 TEST_F(ShaderDiskCacheTest, ClearsCache) {
   InitCache();
 
-  scoped_refptr<ShaderDiskCache> cache =
-      ShaderCacheFactory::GetInstance()->Get(kDefaultClientId);
+  scoped_refptr<ShaderDiskCache> cache = factory()->Get(kDefaultClientId);
   ASSERT_TRUE(cache.get() != NULL);
 
   net::TestCompletionCallback available_cb;
   int rv = cache->SetAvailableCallback(available_cb.callback());
   ASSERT_EQ(net::OK, available_cb.GetResult(rv));
   EXPECT_EQ(0, cache->Size());
 
   cache->Cache(kCacheKey, kCacheValue);
 
   net::TestCompletionCallback complete_cb;
   rv = cache->SetCacheCompleteCallback(complete_cb.callback());
   ASSERT_EQ(net::OK, complete_cb.GetResult(rv));
   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