File constructor understands lastModified.

Source/bindings/v8/custom/V8BlobCustomHelpers.cpp

Index: Source/bindings/v8/custom/V8BlobCustomHelpers.cpp
diff --git a/Source/bindings/v8/custom/V8BlobCustomHelpers.cpp b/Source/bindings/v8/custom/V8BlobCustomHelpers.cpp
index ee359371b85b659787f80360eee7cc35104bd2fd..6bb8c61dfec582c375a10a5ba50daf8ad6c0ff8e 100644
--- a/Source/bindings/v8/custom/V8BlobCustomHelpers.cpp
+++ b/Source/bindings/v8/custom/V8BlobCustomHelpers.cpp
@@ -38,12 +38,44 @@
 #include "bindings/v8/custom/V8ArrayBufferCustom.h"
 #include "bindings/v8/custom/V8ArrayBufferViewCustom.h"
 #include "core/fileapi/BlobBuilder.h"
+#include "wtf/DateMath.h"
 
 namespace WebCore {
 
 namespace V8BlobCustomHelpers {
 
-bool processBlobPropertyBag(v8::Local<v8::Value> propertyBag, const char* blobClassName, String& contentType, String& endings, v8::Isolate* isolate)
+ParsedProperties::ParsedProperties(bool hasFileProperties)
+    : endings("transparent")
+    , hasFileProperties(hasFileProperties)
+#ifndef NDEBUG
+    , m_hasLastModifiedDate(false)
+#endif // NDEBUG
+{
+}
+
+double ParsedProperties::lastModifiedDate()
+{
+    ASSERT(this->hasFileProperties);
+    ASSERT(this->m_hasLastModifiedDate);
+    return m_lastModifiedDate;
+}
+
+void ParsedProperties::setLastModifiedDate(double lastModifiedDate)
+{
+    ASSERT(this->hasFileProperties);
+    ASSERT(!this->m_hasLastModifiedDate);
+    m_lastModifiedDate = lastModifiedDate;
+#ifndef NDEBUG
+    m_hasLastModifiedDate = true;
+#endif // NDEBUG
+}
+
+void ParsedProperties::setDefaultLastModifiedDate()
+{
+    setLastModifiedDate(currentTime());
+}
+
+bool ParsedProperties::parseBlobPropertyBag(v8::Local<v8::Value> propertyBag, const char* blobClassName, v8::Isolate* isolate)
 {
     ASSERT(endings == "transparent");
 
@@ -65,6 +97,23 @@ bool processBlobPropertyBag(v8::Local<v8::Value> propertyBag, const char* blobCl
         }
         contentType = contentType.lower();
     }
+
+    if (!hasFileProperties)
+        return true;
+
+    v8::Local<v8::Value> lastModifiedDate;
+    V8TRYCATCH_RETURN(bool, containsLastModifiedDate, dictionary.get("lastModifiedDate", lastModifiedDate), false);
+    if (containsLastModifiedDate) {
+        if (!lastModifiedDate->IsDate()) {
+            throwTypeError(ExceptionMessages::failedToConstruct(blobClassName, "The \"lastModifiedDate\" property must be a Date instance."), isolate);
+            return false;
+        }
+        double dateValue = toWebCoreDate(lastModifiedDate);
+        setLastModifiedDate(dateValue / msPerSecond);
+    } else {
+        setDefaultLastModifiedDate();
+    }
+
     return true;
 }