Make SharedBuffer in Resource non-discardable and remove PurgeableVector

third_party/WebKit/Source/core/fetch/Resource.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, 2008, 2009, 2010, 2011 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 342 matching lines @@
 void Resource::appendData(const char* data, size_t length)
 {
     TRACE_EVENT0("blink", "Resource::appendData");
     DCHECK(!m_isRevalidating);
     ASSERT(!errorOccurred());
     if (m_options.dataBufferingPolicy == DoNotBufferData)
         return;
     if (m_data)
         m_data->append(data, length);
     else
-        m_data = SharedBuffer::createPurgeable(data, length);
+        m_data = SharedBuffer::create(data, length);
     setEncodedSize(m_data->size());
 }
 
 void Resource::setResourceBuffer(PassRefPtr<SharedBuffer> resourceBuffer)
 {
     DCHECK(!m_isRevalidating);
     ASSERT(!errorOccurred());
     ASSERT(m_options.dataBufferingPolicy == BufferData);
     m_data = resourceBuffer;
     setEncodedSize(m_data->size());
@@ skipping 675 matching lines @@
     case Resource::TextTrack:
     case Resource::Media:
     case Resource::Manifest:
         return false;
     }
     ASSERT_NOT_REACHED();
     return false;
 }
 
 } // namespace blink