Remove MemoryUsageSupport

Source/platform/MemoryUsageSupport.h

 /*
  * Copyright (C) 2012 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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef MemoryUsageSupport_h
 #define MemoryUsageSupport_h
 
+#include "platform/PlatformExport.h"
 #include "wtf/Forward.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-class MemoryUsageSupport {
+class PLATFORM_EXPORT MemoryUsageSupport {
 public:
     // Returns the current space allocated for the pagefile, in MB.
     // That is committed size for Windows and virtual memory size for POSIX.
     static int memoryUsageMB();
 
     // Same as above, but always returns actual value, without any
     // caches.
     static int actualMemoryUsageMB();
 
     // Returns private and shared usage, in bytes. Private bytes is the amount of
     // memory currently allocated to this process that cannot be shared. Returns
     // false on platform specific error conditions.
     static bool processMemorySizesInBytes(size_t* privateBytes, size_t* sharedBytes);
 
     // A callback for requestProcessMemorySizes
     class ProcessMemorySizesCallback {
     public:
         virtual ~ProcessMemorySizesCallback() { }
         virtual void dataReceived(size_t privateBytes, size_t sharedBytes) = 0;
     };
 
     // Requests private and shared usage, in bytes. Private bytes is the amount of
     // memory currently allocated to this process that cannot be shared.
     static void requestProcessMemorySizes(PassOwnPtr<ProcessMemorySizesCallback> requestCallback);
 };
 
 } // namespace WebCore
 
 #endif // MemoryUsageSupport_h