Implement Blob.close().

LayoutTests/http/tests/xmlhttprequest/post-formdata.html

Index: LayoutTests/http/tests/xmlhttprequest/post-formdata.html
diff --git a/LayoutTests/http/tests/xmlhttprequest/post-formdata.html b/LayoutTests/http/tests/xmlhttprequest/post-formdata.html
index 8777ddcb6813c9455c9d67d97bdddbb1dd696904..afc52a0a3e86c2302ba73104bd8aa26ad0c54818 100644
--- a/LayoutTests/http/tests/xmlhttprequest/post-formdata.html
+++ b/LayoutTests/http/tests/xmlhttprequest/post-formdata.html
@@ -13,6 +13,14 @@ var xhrFormDataTestCases = [{
     data: { bareBlob: new Blob(['blob-value']) },
     result: 'bareBlob=blob:application/octet-stream:blob-value'
 }, {
+    data: { bareBlob: new Blob(['blob-value']) },
+    beforeConstruct: function (t) { t.data.bareBlob.close(); },
+    result: 'bareBlob=blob:application/octet-stream:'
+}, {
+    data: { bareBlob: new Blob(['blob-value']) },
+    beforeSend: function (t) { t.data.bareBlob.close(); },
+    result: 'bareBlob=blob:application/octet-stream:'
+}, {
     data: { mimeBlob: new Blob(['blob-value'], { type: 'text/html' }) },
     result: 'mimeBlob=blob:text/html:blob-value'
 }, {
@@ -27,6 +35,14 @@ var xhrFormDataTestCases = [{
     data: { bareFile: new File(['file-value'], 'file-name.txt') },
     result: 'bareFile=file-name.txt:application/octet-stream:file-value'
 }, {
+    data: { bareFile: new File(['file-value'], 'file-name.txt') },
+    beforeConstruct: function (t) { t.data.bareFile.close(); },
+    result: 'bareFile=file-name.txt:application/octet-stream:'
+}, {
+    data: { bareFile: new File(['file-value'], 'file-name.txt') },
+    beforeSend: function (t) { t.data.bareFile.close(); },
+    result: 'bareFile=file-name.txt:application/octet-stream:'
+}, {
     data: {
         mimeFile: new File(['file-value'], 'file-name.html', { type: 'text/html' })
     },
@@ -71,6 +87,8 @@ function runAsyncTests() {
 
     var testCase = xhrFormDataTestCases[asyncTestCase];
     var formData = new FormData();
+    if (testCase.beforeConstruct)
+        testCase.beforeConstruct(testCase);
     for (var fieldName in testCase.data) {
         fieldValue = testCase.data[fieldName];
         if (fieldValue.constructor === Object)
@@ -82,6 +100,8 @@ function runAsyncTests() {
     xhr = new XMLHttpRequest();
     xhr.onloadend = reportResult;
     xhr.open("POST", xhrFormDataTestUrl, true);
+    if (testCase.beforeSend)
+        testCase.beforeSend(testCase);
     xhr.send(formData);
 }