Remove OwnPtr from Blink.

third_party/WebKit/Source/platform/testing/weburl_loader_mock.h

Index: third_party/WebKit/Source/platform/testing/weburl_loader_mock.h
diff --git a/third_party/WebKit/Source/platform/testing/weburl_loader_mock.h b/third_party/WebKit/Source/platform/testing/weburl_loader_mock.h
index b79626640108cf816a8815129093e62ec1373ce5..8978b777d38d0fc6c91b0eb59aeaeddf51ed8ff2 100644
--- a/third_party/WebKit/Source/platform/testing/weburl_loader_mock.h
+++ b/third_party/WebKit/Source/platform/testing/weburl_loader_mock.h
@@ -7,8 +7,8 @@
 
 #include "base/macros.h"
 #include "public/platform/WebURLLoader.h"
-#include "wtf/OwnPtr.h"
 #include "wtf/WeakPtr.h"
+#include <memory>
 
 namespace blink {
 
@@ -61,7 +61,7 @@ class WebURLLoaderMock : public WebURLLoader {
  private:
   WebURLLoaderMockFactoryImpl* factory_ = nullptr;
   WebURLLoaderClient* client_ = nullptr;
-  OwnPtr<WebURLLoader> default_loader_;
+  std::unique_ptr<WebURLLoader> default_loader_;
   bool using_default_loader_ = false;
   bool is_deferred_ = false;