Revert 138962

Source/WebCore/platform/network/cf/ResourceHandleCFNet.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 790 matching lines @@
         CFURLConnectionHalt(d->m_connection.get());
     else
         CFURLConnectionResume(d->m_connection.get());
 }
 
 bool ResourceHandle::loadsBlocked()
 {
     return false;
 }
 
+bool ResourceHandle::willLoadFromCache(ResourceRequest& request, Frame*)
+{
+    request.setCachePolicy(ReturnCacheDataDontLoad);
+    
+    CFURLResponseRef cfResponse = 0;
+    CFErrorRef cfError = 0;
+    RetainPtr<CFDataRef> data = adoptCF(CFURLConnectionSendSynchronousRequest(request.cfURLRequest(), &cfResponse, &cfError, request.timeoutInterval()));
+    bool cached = cfResponse && !cfError;
+
+    if (cfError)
+        CFRelease(cfError);
+    if (cfResponse)
+        CFRelease(cfResponse);
+
+    return cached;
+}
+
 #if PLATFORM(MAC)
 void ResourceHandle::schedule(SchedulePair* pair)
 {
     CFRunLoopRef runLoop = pair->runLoop();
     if (!runLoop)
         return;
 
     CFURLConnectionScheduleWithRunLoop(d->m_connection.get(), runLoop, pair->mode());
     if (d->m_startWhenScheduled) {
         CFURLConnectionStart(d->m_connection.get());
@@ skipping 97 matching lines @@
         CFDataRef data = static_cast<CFDataRef>(CFArrayGetValueAtIndex(dataArray, index));
         CFDataAppendBytes(mergedData.get(), CFDataGetBytePtr(data), CFDataGetLength(data));
     }
 
     client()->didReceiveData(this, reinterpret_cast<const char*>(CFDataGetBytePtr(mergedData.get())), totalSize, static_cast<int>(totalSize));
 }
 #endif
 
 } // namespace WebCore