[Fetch API] Implement Request.formData and Response.formData.

third_party/WebKit/Source/modules/fetch/Request.cpp

Index: third_party/WebKit/Source/modules/fetch/Request.cpp
diff --git a/third_party/WebKit/Source/modules/fetch/Request.cpp b/third_party/WebKit/Source/modules/fetch/Request.cpp
index 08aff7d0f4da4092d3fc4481149176d6db9e73d5..0db6e5879aaf72bd3ae6387a75efec7c872bd6ba 100644
--- a/third_party/WebKit/Source/modules/fetch/Request.cpp
+++ b/third_party/WebKit/Source/modules/fetch/Request.cpp
@@ -671,6 +671,13 @@ void Request::populateWebServiceWorkerRequest(WebServiceWorkerRequest& webReques
     // to plumb this information in to here.
 }
 
+String Request::contentType() const
+{
+    String result;
+    m_request->headerList()->get(HTTPNames::Content_Type, result);
+    return result;
+}
+
 String Request::mimeType() const
 {
     return m_request->mimeType();