Use WeakPtr and do not use pointer equality in WebURLLoaderMockFactory

content/test/weburl_loader_mock.h

Index: content/test/weburl_loader_mock.h
diff --git a/content/test/weburl_loader_mock.h b/content/test/weburl_loader_mock.h
index 81a8e187bd9aff0cc648f366b23ecf3b96080716..a95cd01595367e5e1de4ee367067af7da58f5cc2 100644
--- a/content/test/weburl_loader_mock.h
+++ b/content/test/weburl_loader_mock.h
@@ -52,10 +52,12 @@ class WebURLLoaderMock : public blink::WebURLLoader {
                           blink::WebURLLoaderClient* client) override;
   void cancel() override;
   void setDefersLoading(bool defer) override;
+  void setLoadingTaskRunner(blink::WebTaskRunner*) override;
 
-  bool isDeferred() { return is_deferred_; }
+  bool is_deferred() { return is_deferred_; }
+  bool is_cancelled() { return !client_; }
 
-  void setLoadingTaskRunner(blink::WebTaskRunner*) override;
+  base::WeakPtr<WebURLLoaderMock> GetWeakPtr();
 
  private:
   WebURLLoaderMockFactory* factory_;