Use TaskRunnerTimer in LinkLoader

third_party/WebKit/Source/core/loader/LinkLoaderTest.cpp

Index: third_party/WebKit/Source/core/loader/LinkLoaderTest.cpp
diff --git a/third_party/WebKit/Source/core/loader/LinkLoaderTest.cpp b/third_party/WebKit/Source/core/loader/LinkLoaderTest.cpp
index f58746638b4967615db5d8d630592471b0be161c..6022ebb7af5ab5e9686f18137f85a67809b6d95e 100644
--- a/third_party/WebKit/Source/core/loader/LinkLoaderTest.cpp
+++ b/third_party/WebKit/Source/core/loader/LinkLoaderTest.cpp
@@ -43,6 +43,10 @@ class MockLinkLoaderClient final
   void didSendLoadForLinkPrerender() override {}
   void didSendDOMContentLoadedForLinkPrerender() override {}
 
+  RefPtr<WebTaskRunner> getLoadingTaskRunner() override {
+    return Platform::current()->currentThread()->getWebTaskRunner();
+  }
+
  private:
   explicit MockLinkLoaderClient(bool shouldLoad) : m_shouldLoad(shouldLoad) {}