Measure usage of FormData.append(name, blob, filename)

Source/core/html/DOMFormData.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/html/DOMFormData.h"
 
 #include "core/fileapi/Blob.h"
 #include "core/fileapi/File.h"
+#include "core/frame/UseCounter.h"
 #include "core/html/HTMLFormElement.h"
 #include "wtf/text/TextEncoding.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 namespace {
 
 class DOMFormDataIterationSource final : public PairIterable<String, FormDataEntryValue>::IterationSource {
 public:
@@ skipping 44 matching lines @@
         if (!toHTMLElement(element)->isDisabledFormControl())
             element->appendFormData(*this, true);
     }
 }
 
 void DOMFormData::append(const String& name, const String& value)
 {
     appendData(name, value);
 }
 
-void DOMFormData::append(const String& name, Blob* blob, const String& filename)
+void DOMFormData::append(ExecutionContext* context, const String& name, Blob* blob, const String& filename)
 {
+    if (blob) {
+        if (blob->isFile()) {
+            if (filename.isNull())
+                UseCounter::count(context, UseCounter::FormDataAppendFile);
+            else
+                UseCounter::count(context, UseCounter::FormDataAppendFileWithFilename);
+        } else {
+            if (filename.isNull())
+                UseCounter::count(context, UseCounter::FormDataAppendBlob);
+            else
+                UseCounter::count(context, UseCounter::FormDataAppendBlobWithFilename);
+        }
+    } else {
+        UseCounter::count(context, UseCounter::FormDataAppendNull);
+    }
     appendBlob(name, blob, filename);
 }
 
 void DOMFormData::get(const String& name, FormDataEntryValue& result)
 {
     Entry entry = getEntry(name);
     if (entry.isString())
         result.setUSVString(entry.string());
     else if (entry.isFile())
         result.setFile(entry.file());
@@ skipping 29 matching lines @@
 {
     setBlob(name, blob, filename);
 }
 
 PairIterable<String, FormDataEntryValue>::IterationSource* DOMFormData::startIteration(ScriptState*, ExceptionState&)
 {
     return new DOMFormDataIterationSource(this);
 }
 
 } // namespace blink