Split the constructor of ThreadableLoader into two methods (ctor and start())

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 101 matching lines @@
     options.preflightPolicy = ConsiderPreflight;
     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;
 
     ResourceLoaderOptions resourceLoaderOptions;
     resourceLoaderOptions.allowCredentials = AllowStoredCredentials;
 
-    if (m_client)
-        m_loader = ThreadableLoader::create(executionContext, this, request, options, resourceLoaderOptions);
-    else
+    if (m_client) {
+        m_loader = ThreadableLoader::create(executionContext, this, options, resourceLoaderOptions);
+        m_loader->start(request);
+    } else {
         ThreadableLoader::loadResourceSynchronously(executionContext, request, *this, options, resourceLoaderOptions);
+    }
 }
 
 void FileReaderLoader::start(ExecutionContext* executionContext, PassRefPtr<BlobDataHandle> blobData)
 {
     ASSERT(executionContext);
     m_urlForReadingIsStream = false;
     startInternal(*executionContext, 0, blobData);
 }
 
 void FileReaderLoader::start(ExecutionContext* executionContext, const Stream& stream, unsigned readSize)
@@ skipping 265 matching lines @@
     m_stringResult = builder.toString();
 }
 
 void FileReaderLoader::setEncoding(const String& encoding)
 {
     if (!encoding.isEmpty())
         m_encoding = WTF::TextEncoding(encoding);
 }
 
 } // namespace blink