[Fetch API] Reflect spec changes of bodyUsed property

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 553e7d79a3e9671cb07c0945619e6751ba51e002..1d64351430c8df0c1cc3eaa15a26c0266e39e19b 100644
--- a/third_party/WebKit/Source/modules/fetch/Request.cpp
+++ b/third_party/WebKit/Source/modules/fetch/Request.cpp
@@ -12,6 +12,7 @@
 #include "core/fetch/ResourceLoaderOptions.h"
 #include "core/loader/ThreadableLoader.h"
 #include "modules/fetch/BodyStreamBuffer.h"
+#include "modules/fetch/DataConsumerHandleUtil.h"
 #include "modules/fetch/FetchBlobDataConsumerHandle.h"
 #include "modules/fetch/FetchManager.h"
 #include "modules/fetch/RequestInit.h"
@@ -50,29 +51,16 @@ FetchRequestData* createCopyOfFetchRequestDataForFetch(ScriptState* scriptState,
 
 Request* Request::createRequestWithRequestOrString(ScriptState* scriptState, Request* inputRequest, const String& inputString, RequestInit& init, ExceptionState& exceptionState)
 {
-    // "1. Let |temporaryBody| be null."
-    BodyStreamBuffer* temporaryBody = nullptr;
-
-    if (inputRequest) {
-        // We check bodyUsed even when the body is null in spite of the
-        // spec. See https://github.com/whatwg/fetch/issues/61 for details.
-        if (inputRequest->bodyUsed()) {
-            exceptionState.throwTypeError("Cannot construct a Request with a Request object that has already been used.");
-            return nullptr;
-        }
+    // "1. If |input| is a Request object and it is disturbed, throw a
+    // TypeError.
+    if (inputRequest && inputRequest->bodyUsed()) {
+        exceptionState.throwTypeError("Cannot construct a Request with a Request object that has already been used.");
+        return nullptr;
     }
 
-    // "2. If |input| is a Request object and |input|'s body is non-null, run
-    // these substeps:"
-    if (inputRequest && inputRequest->hasBody()) {
-        // "1. If |input|'s used flag is set, throw a TypeError."
-        // "2. Set |temporaryBody| to |input|'s body."
-        if (inputRequest->bodyUsed()) {
-            exceptionState.throwTypeError("Cannot construct a Request with a Request object that has already been used.");
-            return nullptr;
-        }
-        temporaryBody = inputRequest->bodyBuffer();
-    }
+    // "2. Let |temporaryBody| be |input|'s request's body if |input| is a
+    // Request object, and null otherwise.
+    BodyStreamBuffer* temporaryBody = inputRequest ? inputRequest->bodyBuffer() : nullptr;
 
     // "3. Let |request| be |input|'s request, if |input| is a Request object,
     // and a new request otherwise."
@@ -306,13 +294,11 @@ Request* Request::createRequestWithRequestOrString(ScriptState* scriptState, Req
 
     // "35. If |input| is a Request object and |input|'s body is non-null, run
     // these substeps:"
-    // We set bodyUsed even when the body is null in spite of the
-    // spec. See https://github.com/whatwg/fetch/issues/61 for details.
-    if (inputRequest) {
-        // "1. Set |input|'s body to null."
-        inputRequest->m_request->setBuffer(nullptr);
-        // "2. Set |input|'s used flag."
-        inputRequest->setBodyPassed();
+    if (inputRequest && inputRequest->bodyBuffer()) {
+        // "1. Set |input|'s body to an empty byte stream."
+        inputRequest->m_request->setBuffer(new BodyStreamBuffer(createFetchDataConsumerHandleFromWebHandle(createDoneDataConsumerHandle())));
+        // "2. Set |input|'s disturbed flag."
+        inputRequest->bodyBuffer()->stream()->setIsDisturbed();
     }
 
     // "36. Return |r|."
@@ -551,9 +537,7 @@ Request* Request::clone(ExceptionState& exceptionState)
 FetchRequestData* Request::passRequestData()
 {
     ASSERT(!bodyUsed());
-    setBodyPassed();
-    FetchRequestData* newRequestData = m_request->pass(executionContext());
-    return newRequestData;
+    return m_request->pass(executionContext());
 }
 
 bool Request::hasBody() const