Remove redundant reading and writing of data about SharedBuffer.

third_party/WebKit/Source/core/loader/resource/ImageResource.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
@@ skipping 356 matching lines @@
   GetContent()->NotifyStartLoad();
 }
 
 void ImageResource::Finish(double load_finish_time) {
   if (multipart_parser_) {
     multipart_parser_->Finish();
     if (Data())
       UpdateImageAndClearBuffer();
   } else {
     UpdateImage(Data(), ImageResourceContent::kUpdateImage, true);
-    // As encoded image data can be created from m_image  (see
-    // ImageResource::resourceBuffer(), we don't have to keep m_data. Let's
-    // clear this. As for the lifetimes of m_image and m_data, see this
-    // document:
-    // https://docs.google.com/document/d/1v0yTAZ6wkqX2U_M6BNIGUJpM1s0TIw1VsqpxoL7aciY/edit?usp=sharing
-    ClearData();
   }
   Resource::Finish(load_finish_time);
 }
 
 void ImageResource::FinishAsError(const ResourceError& error) {
   if (multipart_parser_)
     multipart_parser_->Cancel();
   // TODO(hiroshige): Move setEncodedSize() call to Resource::error() if it
   // is really needed, or remove it otherwise.
   SetEncodedSize(0);
@@ skipping 233 matching lines @@
     //    reloading in Step 3 due to notifyObservers()'s
     //    schedulingReloadOrShouldReloadBrokenPlaceholder() check.
     // 3. reloadIfLoFiOrPlaceholderImage() is called via ResourceFetcher
     //    (a) via didFinishLoading() called in decodeError(), or
     //    (b) after returning ImageResource::updateImage().
     DecodeError(all_data_received);
   }
 }
 
 }  // namespace blink