Make WebTaskRunner ThreadSafeRefCounted

third_party/WebKit/Source/core/fetch/MockFetchContext.h

Index: third_party/WebKit/Source/core/fetch/MockFetchContext.h
diff --git a/third_party/WebKit/Source/core/fetch/MockFetchContext.h b/third_party/WebKit/Source/core/fetch/MockFetchContext.h
index b90c0fd9b1ebfb02408cd97e831accaf3d669466..01e52d09c56ea6ad670f9aa6ccaa1a3390088bf8 100644
--- a/third_party/WebKit/Source/core/fetch/MockFetchContext.h
+++ b/third_party/WebKit/Source/core/fetch/MockFetchContext.h
@@ -50,7 +50,7 @@ class MockFetchContext : public FetchContext {
   bool shouldLoadNewResource(Resource::Type) const override {
     return m_loadPolicy == kShouldLoadNewResource;
   }
-  WebTaskRunner* loadingTaskRunner() const override { return m_runner.get(); }
+  RefPtr<WebTaskRunner> loadingTaskRunner() const override { return m_runner; }
 
   void setCachePolicy(CachePolicy policy) { m_policy = policy; }
   CachePolicy getCachePolicy() const override { return m_policy; }
@@ -67,13 +67,13 @@ class MockFetchContext : public FetchContext {
   MockFetchContext(LoadPolicy loadPolicy)
       : m_loadPolicy(loadPolicy),
         m_policy(CachePolicyVerify),
-        m_runner(WTF::wrapUnique(new scheduler::FakeWebTaskRunner)),
+        m_runner(adoptRef(new scheduler::FakeWebTaskRunner)),
         m_complete(false),
         m_transferSize(-1) {}
 
   enum LoadPolicy m_loadPolicy;
   CachePolicy m_policy;
-  std::unique_ptr<scheduler::FakeWebTaskRunner> m_runner;
+  RefPtr<scheduler::FakeWebTaskRunner> m_runner;
   bool m_complete;
   long long m_transferSize;
 };