Factor File API's 'partial interface URL' impl into separate files

third_party/WebKit/Source/core/fileapi/URLFileAPI.h

Index: third_party/WebKit/Source/core/fileapi/URLFileAPI.h
diff --git a/third_party/WebKit/Source/core/fileapi/URLFileAPI.h b/third_party/WebKit/Source/core/fileapi/URLFileAPI.h
new file mode 100644
index 0000000000000000000000000000000000000000..1c2c69703a5533f4150abef52aea818ca6f3cb0c
--- /dev/null
+++ b/third_party/WebKit/Source/core/fileapi/URLFileAPI.h
@@ -0,0 +1,26 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef URLFileAPI_h
+#define URLFileAPI_h
+
+#include "wtf/Allocator.h"
+#include "wtf/Forward.h"
+
+namespace blink {
+
+class ExceptionState;
+class ExecutionContext;
+class Blob;
+
+class URLFileAPI {
+    STATIC_ONLY(URLFileAPI);
+public:
+    static String createObjectURL(ExecutionContext*, Blob*, ExceptionState&);
+    static void revokeObjectURL(ExecutionContext*, const String&);
+};
+
+} // namespace blink
+
+#endif