Make ThreadableLoader class to use references

Source/core/fileapi/FileReaderLoader.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 63 matching lines @@
 {
     terminate();
     if (!m_urlForReading.isEmpty()) {
         if (m_urlForReadingIsStream)
             BlobRegistry::unregisterStreamURL(m_urlForReading);
         else
             BlobRegistry::revokePublicBlobURL(m_urlForReading);
     }
 }
 
-void FileReaderLoader::startInternal(ExecutionContext* executionContext, const Stream* stream, PassRefPtr<BlobDataHandle> blobData)
+void FileReaderLoader::startInternal(ExecutionContext& executionContext, const Stream* stream, PassRefPtr<BlobDataHandle> blobData)
 {
     // The blob is read by routing through the request handling layer given a temporary public url.
-    m_urlForReading = BlobURL::createPublicURL(executionContext->securityOrigin());
+    m_urlForReading = BlobURL::createPublicURL(executionContext.securityOrigin());
     if (m_urlForReading.isEmpty()) {
         failed(FileError::SECURITY_ERR);
         return;
     }
 
     if (blobData) {
         ASSERT(!stream);
-        BlobRegistry::registerPublicBlobURL(executionContext->securityOrigin(), m_urlForReading, blobData);
+        BlobRegistry::registerPublicBlobURL(executionContext.securityOrigin(), m_urlForReading, blobData);
     } else {
         ASSERT(stream);
-        BlobRegistry::registerStreamURL(executionContext->securityOrigin(), m_urlForReading, stream->url());
+        BlobRegistry::registerStreamURL(executionContext.securityOrigin(), m_urlForReading, stream->url());
     }
 
     // Construct and load the request.
     ResourceRequest request(m_urlForReading);
     request.setHTTPMethod("GET");
     if (m_hasRange)
         request.setHTTPHeaderField("Range", AtomicString(String::format("bytes=%d-%d", m_rangeStart, m_rangeEnd)));
 
     ThreadableLoaderOptions options;
     options.sniffContent = DoNotSniffContent;
     options.preflightPolicy = ConsiderPreflight;
     options.allowCredentials = AllowStoredCredentials;
     options.crossOriginRequestPolicy = DenyCrossOriginRequests;
     // FIXME: Is there a directive to which this load should be subject?
     options.contentSecurityPolicyEnforcement = DoNotEnforceContentSecurityPolicy;
     // Use special initiator to hide the request from the inspector.
     options.initiator = FetchInitiatorTypeNames::internal;
 
     if (m_client)
         m_loader = ThreadableLoader::create(executionContext, this, request, options);
     else
         ThreadableLoader::loadResourceSynchronously(executionContext, request, *this, options);
 }
 
 void FileReaderLoader::start(ExecutionContext* executionContext, PassRefPtr<BlobDataHandle> blobData)
 {
+    ASSERT(executionContext);
     m_urlForReadingIsStream = false;
-    startInternal(executionContext, 0, blobData);
+    startInternal(*executionContext, 0, blobData);
 }
 
 void FileReaderLoader::start(ExecutionContext* executionContext, const Stream& stream, unsigned readSize)
 {
+    ASSERT(executionContext);
     if (readSize > 0) {
         m_hasRange = true;
         m_rangeStart = 0;
         m_rangeEnd = readSize - 1; // End is inclusive so (0,0) is a 1-byte read.
     }
 
     m_urlForReadingIsStream = true;
-    startInternal(executionContext, &stream, nullptr);
+    startInternal(*executionContext, &stream, nullptr);
 }
 
 void FileReaderLoader::cancel()
 {
     m_errorCode = FileError::ABORT_ERR;
     terminate();
 }
 
 void FileReaderLoader::terminate()
 {
@@ skipping 245 matching lines @@
     m_stringResult = builder.toString();
 }
 
 void FileReaderLoader::setEncoding(const String& encoding)
 {
     if (!encoding.isEmpty())
         m_encoding = WTF::TextEncoding(encoding);
 }
 
 } // namespace WebCore