Support 'URLSearchParams' as the body of a Request

third_party/WebKit/Source/core/dom/URLSearchParams.h

Index: third_party/WebKit/Source/core/dom/URLSearchParams.h
diff --git a/third_party/WebKit/Source/core/dom/URLSearchParams.h b/third_party/WebKit/Source/core/dom/URLSearchParams.h
index 7eb3dfbe3d4f20f44d7b60e0710333ac5a47cb03..18677eec9bce1e911ba7020061764c00dcf3a355 100644
--- a/third_party/WebKit/Source/core/dom/URLSearchParams.h
+++ b/third_party/WebKit/Source/core/dom/URLSearchParams.h
@@ -9,6 +9,7 @@
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "bindings/core/v8/UnionTypesCore.h"
 #include "platform/heap/Handle.h"
+#include "platform/network/EncodedFormData.h"
 #include "wtf/Forward.h"
 #include "wtf/text/WTFString.h"
 #include <utility>
@@ -43,9 +44,14 @@ public:
     void set(const String& name, const String& value);
     void setInput(const String&);
 
+    // Internal helpers
+    PassRefPtr<EncodedFormData> encodeFormData() const;
+
     DECLARE_TRACE();
 
 private:
+    friend class URLSearchParamsTest_EncodedFormData_Test;
+
     explicit URLSearchParams(const String&);
     explicit URLSearchParams(URLSearchParams*);
     Vector<std::pair<String, String>> m_params;