Drop [LegacyInterfaceTypeChecking] where trivial in core/

third_party/WebKit/Source/core/fileapi/FileReaderSync.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 29 matching lines @@
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
 
 FileReaderSync::FileReaderSync()
 {
 }
 
 PassRefPtr<DOMArrayBuffer> FileReaderSync::readAsArrayBuffer(ExecutionContext* executionContext, Blob* blob, ExceptionState& exceptionState)
 {
-    if (!blob) {
-        exceptionState.throwDOMException(NotFoundError, FileError::notFoundErrorMessage);
-        return nullptr;
-    }
+    ASSERT(blob);
 
     FileReaderLoader loader(FileReaderLoader::ReadAsArrayBuffer, nullptr);
     startLoading(executionContext, loader, *blob, exceptionState);
 
     return loader.arrayBufferResult();
 }
 
 String FileReaderSync::readAsBinaryString(ExecutionContext* executionContext, Blob* blob, ExceptionState& exceptionState)
 {
-    if (!blob) {
-        exceptionState.throwDOMException(NotFoundError, FileError::notFoundErrorMessage);
-        return String();
-    }
+    ASSERT(blob);
 
     FileReaderLoader loader(FileReaderLoader::ReadAsBinaryString, 0);
     startLoading(executionContext, loader, *blob, exceptionState);
     return loader.stringResult();
 }
 
 String FileReaderSync::readAsText(ExecutionContext* executionContext, Blob* blob, const String& encoding, ExceptionState& exceptionState)
 {
-    if (!blob) {
-        exceptionState.throwDOMException(NotFoundError, FileError::notFoundErrorMessage);
-        return String();
-    }
+    ASSERT(blob);
 
     FileReaderLoader loader(FileReaderLoader::ReadAsText, nullptr);
     loader.setEncoding(encoding);
     startLoading(executionContext, loader, *blob, exceptionState);
     return loader.stringResult();
 }
 
 String FileReaderSync::readAsDataURL(ExecutionContext* executionContext, Blob* blob, ExceptionState& exceptionState)
 {
-    if (!blob) {
-        exceptionState.throwDOMException(NotFoundError, FileError::notFoundErrorMessage);
-        return String();
-    }
+    ASSERT(blob);
 
     FileReaderLoader loader(FileReaderLoader::ReadAsDataURL, nullptr);
     loader.setDataType(blob->type());
     startLoading(executionContext, loader, *blob, exceptionState);
     return loader.stringResult();
 }
 
 void FileReaderSync::startLoading(ExecutionContext* executionContext, FileReaderLoader& loader, const Blob& blob, ExceptionState& exceptionState)
 {
     loader.start(executionContext, blob.blobDataHandle());
     if (loader.errorCode())
         FileError::throwDOMException(exceptionState, loader.errorCode());
 }
 
 } // namespace blink