Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/core/css/resolver/FontBuilderTest.cpp

Index: third_party/WebKit/Source/core/css/resolver/FontBuilderTest.cpp
diff --git a/third_party/WebKit/Source/core/css/resolver/FontBuilderTest.cpp b/third_party/WebKit/Source/core/css/resolver/FontBuilderTest.cpp
index 6a7591a21a891acc549f11b78821cda2c32d8595..3206d150354db8ebf29c20d34827ea014b852737 100644
--- a/third_party/WebKit/Source/core/css/resolver/FontBuilderTest.cpp
+++ b/third_party/WebKit/Source/core/css/resolver/FontBuilderTest.cpp
@@ -11,7 +11,6 @@
 #include "core/style/ComputedStyle.h"
 #include "core/testing/DummyPageHolder.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include <memory>
 
 namespace blink {
 
@@ -27,7 +26,7 @@ public:
     Settings& settings() { return *document().settings(); }
 
 private:
-    std::unique_ptr<DummyPageHolder> m_dummy;
+    OwnPtr<DummyPageHolder> m_dummy;
 };
 
 using BuilderFunc = void (*)(FontBuilder&);