Blob/File constructors/slice method shouldn't throw on invalid types

third_party/WebKit/Source/core/fileapi/File.cpp

Index: third_party/WebKit/Source/core/fileapi/File.cpp
diff --git a/third_party/WebKit/Source/core/fileapi/File.cpp b/third_party/WebKit/Source/core/fileapi/File.cpp
index 5ca1b94385feb6f04a5fa68a49858400638e3bb6..bf8b4a3cdaa4f4e6cbf122ce1bc2a1b609223284 100644
--- a/third_party/WebKit/Source/core/fileapi/File.cpp
+++ b/third_party/WebKit/Source/core/fileapi/File.cpp
@@ -111,11 +111,6 @@ File* File::create(
     const FilePropertyBag& options,
     ExceptionState& exceptionState) {
   ASSERT(options.hasType());
-  if (!options.type().containsOnlyASCII()) {
-    exceptionState.throwDOMException(
-        SyntaxError, "The 'type' property must consist of ASCII characters.");
-    return nullptr;
-  }
 
   double lastModified;
   if (options.hasLastModified())
@@ -128,7 +123,7 @@ File* File::create(
     UseCounter::count(context, UseCounter::FileAPINativeLineEndings);
 
   std::unique_ptr<BlobData> blobData = BlobData::create();
-  blobData->setContentType(options.type().lower());
+  blobData->setContentType(normalizeType(options.type()));
   populateBlobData(blobData.get(), fileBits, normalizeLineEndingsToNative);
 
   long long fileSize = blobData->length();
@@ -314,7 +309,7 @@ Blob* File::slice(long long start,
 
   long long length = end - start;
   std::unique_ptr<BlobData> blobData = BlobData::create();
-  blobData->setContentType(contentType);
+  blobData->setContentType(normalizeType(contentType));
   if (!m_fileSystemURL.isEmpty()) {
     blobData->appendFileSystemURL(m_fileSystemURL, start, length,
                                   modificationTimeMS / msPerSecond);