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

third_party/WebKit/Source/platform/network/HTTPParsers.cpp

Index: third_party/WebKit/Source/platform/network/HTTPParsers.cpp
diff --git a/third_party/WebKit/Source/platform/network/HTTPParsers.cpp b/third_party/WebKit/Source/platform/network/HTTPParsers.cpp
index bd5257dece6b4a7ce03560d17ba556f50cd38c51..866c8f1942dc884c631dbc54aa78e8a9f7c5f9d2 100644
--- a/third_party/WebKit/Source/platform/network/HTTPParsers.cpp
+++ b/third_party/WebKit/Source/platform/network/HTTPParsers.cpp
@@ -34,6 +34,7 @@
 
 #include "net/http/http_response_headers.h"
 #include "net/http/http_util.h"
+#include "platform/HTTPNames.h"
 #include "platform/json/JSONParser.h"
 #include "platform/network/ResourceResponse.h"
 #include "platform/weborigin/Suborigin.h"
@@ -898,6 +899,47 @@ bool parseMultipartHeadersFromBody(const char* bytes,
   return true;
 }
 
+bool parseMultipartFormHeadersFromBody(const char* bytes,
+                                       size_t size,
+                                       HTTPHeaderMap* headerFields,
+                                       size_t* end) {
+  DCHECK_EQ(0u, headerFields->size());
+
+  int headersEndPos =
+      net::HttpUtil::LocateEndOfAdditionalHeaders(bytes, size, 0);
+
+  if (headersEndPos < 0)
+    return false;
+
+  *end = headersEndPos;
+
+  // Eat headers and prepend a status line as is required by
+  // HttpResponseHeaders.
+  std::string headers("HTTP/1.1 200 OK\r\n");
+  headers.append(bytes, headersEndPos);
+
+  scoped_refptr<net::HttpResponseHeaders> responseHeaders =
+      new net::HttpResponseHeaders(
+          net::HttpUtil::AssembleRawHeaders(headers.data(), headers.length()));
+
+  // Copy selected headers to the response.
+  const AtomicString* const headerNamePointers[] = {
+      &HTTPNames::Content_Disposition, &HTTPNames::Content_Transfer_Encoding,
+      &HTTPNames::Content_Type};
+  for (const AtomicString* headerNamePointer : headerNamePointers) {
+    StringUTF8Adaptor adaptor(*headerNamePointer);
+    size_t iterator = 0;
+    base::StringPiece headerNameStringPiece = adaptor.asStringPiece();
+    std::string value;
+    while (responseHeaders->EnumerateHeader(&iterator, headerNameStringPiece,
+                                            &value)) {
+      headerFields->add(*headerNamePointer, WebString::fromUTF8(value));
+    }
+  }
+
+  return true;
+}
+
 // See https://tools.ietf.org/html/draft-ietf-httpbis-jfv-01, Section 4.
 std::unique_ptr<JSONArray> parseJSONHeader(const String& header,
                                            int maxParseDepth) {