Implement File constructor.

Source/bindings/v8/custom/V8BlobCustomHelpers.h

 /*
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[kinuko, 2013/11/14 05:41:06]

This header file has no include guard-- is it intentional?

[pwnall-personal, 2013/11/14 14:31:19]

Done.
Yikes! Thank you for catching this!

-#include "config.h"
-#include "V8ErrorEvent.h"
-
-#include "RuntimeEnabledFeatures.h"
-#include "V8Event.h"
-#include "bindings/v8/DOMWrapperWorld.h"
-#include "bindings/v8/Dictionary.h"
-#include "bindings/v8/ScriptState.h"
-#include "bindings/v8/SerializedScriptValue.h"
 #include "bindings/v8/V8Binding.h"
-#include "bindings/v8/V8DOMWrapper.h"
-#include "bindings/v8/V8HiddenPropertyName.h"
-#include "core/dom/ContextFeatures.h"
 
 namespace WebCore {
 
-void V8ErrorEvent::errorAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
-{
-    v8::Handle<v8::Value> error = info.Holder()->GetHiddenValue(V8HiddenPropertyName::error(info.GetIsolate()));
+class BlobBuilder;
 
-    if (!error.IsEmpty()) {
-        v8SetReturnValue(info, error);
-        return;
-    }
+// Shared code between the custom constructor bindings for Blob and File.
+namespace V8BlobCustomHelpers {
 
-    v8SetReturnValueNull(info);
-}
+// Extracts the "type" and "endings" properties out of the BlobPropertyBag passed to a Blob constructor.
+// http://www.w3.org/TR/FileAPI/#constructorParams
+// Returns true if everything went well, false if a JS exception was thrown.
+bool processBlobPropertyBag(v8::Local<v8::Value> propertyBag, v8::Isolate*, const char* blobClassName, String& contentType, String& endings);
+
+// Appends the blobParts passed to a Blob constructor into a BlobBuilder.
+// http://www.w3.org/TR/FileAPI/#constructorParams
+// Returns true if everything went well, false if a JS exception was thrown.
+bool processBlobParts(v8::Local<v8::Object> blobParts, uint32_t blobPartsLength, v8::Isolate*, const String& endings, BlobBuilder&);
+
+} // namespace V8BlobCustomHelpers
 
 } // namespace WebCore