Support 'URLSearchParams' as the body of a Request

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

Index: third_party/WebKit/Source/core/dom/URLSearchParams.cpp
diff --git a/third_party/WebKit/Source/core/dom/URLSearchParams.cpp b/third_party/WebKit/Source/core/dom/URLSearchParams.cpp
index 141aab146e4f1feaa174d80c4713aa2367b03cf5..b8108c7de3b4fdc38079c0321d9826347888c7b4 100644
--- a/third_party/WebKit/Source/core/dom/URLSearchParams.cpp
+++ b/third_party/WebKit/Source/core/dom/URLSearchParams.cpp
@@ -5,6 +5,7 @@
 #include "config.h"
 #include "core/dom/URLSearchParams.h"
 
+#include "platform/network/FormDataEncoder.h"
 #include "platform/weborigin/KURL.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/text/TextEncoding.h"
@@ -176,6 +177,16 @@ void URLSearchParams::set(const String& name, const String& value)
         append(name, value);
 }
 
+PassRefPtr<EncodedFormData> URLSearchParams::encodeFormData() const
+{
+    RefPtr<EncodedFormData> data = EncodedFormData::create();
+    Vector<char> encodedData;
+    for (const auto& param : m_params)
+        FormDataEncoder::addKeyValuePairAsFormData(encodedData, param.first.utf8(), param.second.utf8(), EncodedFormData::FormURLEncoded);
+    data->appendData(encodedData.data(), encodedData.size());
+    return data.release();
+}
+
 DEFINE_TRACE(URLSearchParams)
 {
 }