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

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/fetch/BodyStreamBuffer.h"
 
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8HiddenValue.h"
 #include "bindings/core/v8/V8ThrowException.h"
 #include "core/dom/DOMArrayBuffer.h"
@@ skipping 28 matching lines @@
       PassRefPtr<BlobDataHandle> blobDataHandle) override {
     m_buffer->endLoading();
     m_client->didFetchDataLoadedBlobHandle(std::move(blobDataHandle));
   }
 
   void didFetchDataLoadedArrayBuffer(DOMArrayBuffer* arrayBuffer) override {
     m_buffer->endLoading();
     m_client->didFetchDataLoadedArrayBuffer(arrayBuffer);
   }
 
+  void didFetchDataLoadedFormData(FormData* formData) override {
+    m_buffer->endLoading();
+    m_client->didFetchDataLoadedFormData(formData);
+  }
+
   void didFetchDataLoadedString(const String& string) override {
     m_buffer->endLoading();
     m_client->didFetchDataLoadedString(string);
   }
 
   void didFetchDataLoadedStream() override {
     m_buffer->endLoading();
     m_client->didFetchDataLoadedStream();
   }
 
@@ skipping 215 matching lines @@
   }
 
   ScriptState::Scope scope(m_scriptState.get());
   NonThrowableExceptionState exceptionState;
   ScriptValue reader = ReadableStreamOperations::getReader(
       m_scriptState.get(), stream(), exceptionState);
   ReadableStreamOperations::defaultReaderRead(m_scriptState.get(), reader);
 }
 
 void BodyStreamBuffer::close() {
-  controller()->close();
+  if (controller())
+    controller()->close();
   cancelConsumer();
 }
 
 void BodyStreamBuffer::error() {
   {
     ScriptState::Scope scope(m_scriptState.get());
     controller()->error(V8ThrowException::createTypeError(
         m_scriptState->isolate(), "network error"));
   }
   cancelConsumer();
@@ skipping 89 matching lines @@
   }
   if (isErrored)
     return BytesConsumer::createErrored(BytesConsumer::Error("error"));
 
   DCHECK(consumer);
   consumer->clearClient();
   return consumer;
 }
 
 }  // namespace blink